WO2022138777A1 - Die for molding machine, and molding machine - Google Patents

Die for molding machine, and molding machine Download PDF

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Publication number
WO2022138777A1
WO2022138777A1 PCT/JP2021/047730 JP2021047730W WO2022138777A1 WO 2022138777 A1 WO2022138777 A1 WO 2022138777A1 JP 2021047730 W JP2021047730 W JP 2021047730W WO 2022138777 A1 WO2022138777 A1 WO 2022138777A1
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WO
WIPO (PCT)
Prior art keywords
pressure
mold
damping member
molding machine
pin
Prior art date
Application number
PCT/JP2021/047730
Other languages
French (fr)
Japanese (ja)
Inventor
眞 辻
浩 吉田
三郎 野田
Original Assignee
芝浦機械株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 芝浦機械株式会社 filed Critical 芝浦機械株式会社
Priority to CN202180083160.5A priority Critical patent/CN116635171A/en
Priority to MX2023007482A priority patent/MX2023007482A/en
Publication of WO2022138777A1 publication Critical patent/WO2022138777A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies

Definitions

  • the present invention relates to a mold for a molding machine that manufactures a molded product by filling a cavity in a mold with molten metal using an injection device, and a molding machine.
  • a die casting machine which is an example of a molding machine, manufactures a molded product (die casting product) by filling a cavity in a mold that has been molded using a mold clamping device with molten metal using an injection device. do.
  • die casting machines it is required to fill the cavity in the mold with molten metal in a short time, especially in order to cope with the increase in size and thinning of the molded product.
  • shrinkage cavity inside the molded product.
  • a method of suppressing shrinkage cavities for example, there is a local pressurization method in which a pressurizing pin provided on the die is pushed into a molded product after the molten metal starts solidifying in the die.
  • Patent Document 1 describes a pressure damping device that uses a spring to attenuate the surge pressure generated in the molten metal. Further, Patent Document 2 describes a local pressurizing device that pushes a pressurizing pin into a molded product by using the force of a spring.
  • An object to be solved by the present invention is to provide a mold for a molding machine and a molding machine provided with a local pressurizing device capable of reducing surge pressure.
  • the molding machine mold of one aspect of the present invention includes a main body portion having a molding surface and a support surface facing the molding surface, and a local pressurizing device having at least a part incorporated in the main body portion.
  • the local pressurizing device includes a pressurizing pin whose one end is exposed on the side of the molding surface of the main body, an actuator provided on the side of the support surface of the main body and driving the pressurizing pin, and the addition.
  • a pressure damping member provided between the pressure pin and the main body portion so as to surround the pressure pin and one end of which is exposed on the side of the molding surface of the main body portion, and between the pressure damping member and the support surface. Including the provided elastic body.
  • the local pressurizing device further includes an annular first sealing member provided between the pressure damping member and the main body portion so as to surround the pressure damping member. Is preferable.
  • the first sealing member contains cast iron or steel.
  • the local pressurizing device further includes an annular second sealing member provided between the pressurizing pin and the pressure damping member so as to surround the pressurizing pin. Is preferable.
  • the pressure pin has an annular convex portion that can be contacted with the other end of the pressure damping member.
  • the molding machine mold of the above aspect further includes a position sensor that monitors the position of the pressure pin.
  • the elastic body is a disc spring.
  • the one end of the pressure pin when the pressure pin is located in the retracting limit is the one end of the pressure damping member when the pressure damping member is located in the forward limit. It is preferable that the position is flush with the surface or protrudes toward the molding surface.
  • the one end of the pressure pin when the pressure pin is located in the retracting limit is the one end of the pressure damping member when the pressure damping member is located in the forward limit. It is preferable that it is on the side of the support surface.
  • the molding machine according to one aspect of the present invention includes a mold for the molding machine according to the above aspect.
  • the schematic diagram which shows the whole structure of the molding machine of 1st Embodiment.
  • the explanatory view of the operation of the local pressurizing apparatus of 1st Embodiment. The explanatory view of the operation of the local pressurizing apparatus of 1st Embodiment.
  • the explanatory view of the operation of the local pressurizing apparatus of 1st Embodiment The explanatory view of the operation of the local pressurizing apparatus of 1st Embodiment.
  • the schematic sectional view of the mold for a molding machine of 2nd Embodiment The schematic sectional view of the mold for a molding machine of 2nd Embodiment.
  • the explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment The explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment.
  • the explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment The explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment.
  • the explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment The explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment.
  • the explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment The explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment.
  • the explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment. The explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment.
  • hydraulic pressure will be used as an example of hydraulic pressure.
  • a hydraulic circuit will be described as an example of a hydraulic circuit, a hydraulic actuator as an example of a hydraulic actuator, and a hydraulic device as an example of a hydraulic device.
  • water pressure can be used instead of hydraulic pressure.
  • a hydraulic fluid will be used as an example of the hydraulic fluid.
  • the molding machine mold of the first embodiment includes a main body portion having a molding surface and a support surface facing the molding surface, and a local pressurizing device having at least a part incorporated in the main body portion.
  • the pressure device is provided between a pressure pin whose one end is exposed on the molding surface side of the main body, an actuator provided on the support surface side of the main body to drive the pressure pin, and the pressure pin and the main body. It includes a pressure damping member provided around the pressure pin and one end of which is exposed on the molding surface side of the main body portion, and an elastic body provided between the pressure damping member and the support surface.
  • one end of the pressure pin when the pressure pin is located at the retracting limit is flush with one end of the pressure damping member when the pressure damping member is located at the forward limit. It is in a position protruding toward the molding surface.
  • the molding machine of the first embodiment includes a molding machine mold having the above configuration.
  • FIG. 1 is a schematic diagram showing the overall configuration of the molding machine of the first embodiment.
  • FIG. 1 is a side view including a cross-sectional view in part.
  • the molding machine of the first embodiment is a die casting machine 100.
  • the die casting machine 100 is a cold chamber type die casting machine.
  • the die casting machine 100 includes a mold clamping device 10, an extrusion device 12, an injection device 14, a mold 18, a control unit 20, a base 22, a fixed die plate 24, a movable die plate 26, a link housing 28, and a tie bar 30.
  • the die casting machine 100 manufactures a die cast product by injecting a liquid metal (molten metal) into the inside of the mold 18 (cavity Ca in FIG. 1) to fill the mold 18 and solidifying the liquid metal in the mold 18. It is a machine.
  • the metal is, for example, aluminum, an aluminum alloy, a zinc alloy, or a magnesium alloy.
  • the mold 18 includes a fixed mold 18a and a movable mold 18b.
  • the mold 18 is provided between the mold clamping device 10 and the injection device 14.
  • the fixed type 18a includes a main body 40 and a local pressurizing device 50.
  • the fixed mold 18a is an example of a mold for a molding machine according to the first embodiment.
  • the fixed die plate 24 is fixed on the base 22.
  • the fixed die plate 24 can hold the fixed mold 18a.
  • the movable die plate 26 is provided on the base 22 so as to be movable in the mold opening / closing direction.
  • the mold opening / closing direction means both the mold opening direction and the mold closing direction shown in FIG.
  • the movable die plate 26 can hold the movable mold 18b facing the fixed mold 18a.
  • the link housing 28 is provided on the base 22. One end of the link mechanism constituting the mold clamping device 10 is fixed to the link housing 28.
  • the fixed die plate 24 and the link housing 28 are fixed by the tie bar 30.
  • the tie bar 30 supports the mold clamping force while the mold clamping force is applied to the fixed mold 18a and the movable mold 18b. It was
  • the mold clamping device 10 has a function of opening and closing the mold 18 and mold clamping.
  • the injection device 14 has a function of injecting molten metal into the cavity Ca of the mold 18, filling the cavity Ca of the mold 18 with the molten metal, and pressurizing the molten metal.
  • the extruder 12 has a function of extruding the manufactured die-cast product from the mold 18.
  • the control unit 20 includes a control device 32, an input device 34, and a display device 36.
  • the control unit 20 has a function of controlling the molding operation of the die casting machine 100 using the mold clamping device 10, the extrusion device 12, the injection device 14, and the local pressurizing device 50.
  • the input device 34 accepts an operator's input operation.
  • the operator can set the molding conditions and the like of the die casting machine 100 by using the input device 34.
  • the input device 34 is, for example, a touch panel using a liquid crystal display or an organic EL display.
  • the display device 36 displays, for example, the molding conditions, operating status, etc. of the die casting machine 100 on the screen.
  • the display device 36 is, for example, a liquid crystal display or an organic EL display.
  • the control device 32 has a function of performing various calculations and outputting control commands to each part of the die casting machine 100.
  • the control device 32 has, for example, a function of storing molding conditions and the like.
  • the control device 32 controls, for example, the operation of the injection device 14.
  • the control device 32 controls the operation of the local pressurizing device 50 based on, for example, the filling status of the molten metal in the cavity Ca of the mold 18.
  • the control device 32 is composed of, for example, a combination of hardware and software.
  • the control device 32 includes, for example, a CPU (Central Processing Unit), a semiconductor memory, and a control program stored in the semiconductor memory.
  • a CPU Central Processing Unit
  • FIG. 2 is a schematic cross-sectional view of the mold for a molding machine according to the first embodiment.
  • FIG. 2 shows a state in which the fixed mold 18a and the movable mold 18b are in contact with each other, in other words, a state in which the fixed mold 18a and the movable mold 18b are molded.
  • the region sandwiched between the fixed mold 18a and the movable mold 18b is the cavity Ca.
  • the fixed type 18a includes a main body portion 40 and a local pressurizing device 50. At least a part of the local pressurizing device 50 is incorporated in the main body 40.
  • the main body portion 40 has a molding surface 40x and a support surface 40y.
  • the support surface 40y faces the molding surface 40x.
  • the molded surface 40x is a surface on the side of the cavity Ca.
  • the support surface 40y is a surface on the side of the fixed die plate 24.
  • the local pressurizing device 50 includes a pressurizing pin 52, an actuator 54, a pressure damping member 56, a first sealing member 58, a second sealing member 60, a disc spring 62 (elastic body), and a position sensor 64.
  • the pressure pin 52 has a first convex portion 52a (convex portion).
  • the actuator 54 has a cylinder 54a, a piston 54b, a position sensor rod 54c, a rod side chamber 54x, and a cap side chamber 54y.
  • the pressure damping member 56 has a second convex portion 56a.
  • the disc spring 62 is an example of an elastic body.
  • the first convex portion 52a is an example of the convex portion.
  • the pressure pin 52 extends in the direction from the molded surface 40x toward the support surface 40y.
  • the pressure pin 52 extends in the mold opening / closing direction.
  • One end of the pressure pin 52 is exposed on the side of the molding surface 40x of the main body 40.
  • One end of the pressure pin 52 is provided so as to be projectable in the cavity Ca.
  • the other end of the pressure pin 52 is provided on the side of the support surface 40y.
  • the other end of the pressure pin 52 is fixed to, for example, the piston 54b of the actuator 54.
  • the pressure pin 52 has, for example, a cylindrical shape.
  • the diameter of the pressure pin 52 is, for example, 10 mm or more and 30 mm or less.
  • At least a part of the pressure pin 52 is surrounded by the pressure damping member 56. At least a part of the pressure pin 52 is surrounded by the main body 40. The pressure pin 52 is slidably provided with respect to the pressure damping member 56.
  • the first convex portion 52a is a part of the pressure pin 52.
  • the first convex portion 52a has, for example, an annular shape.
  • the first convex portion 52a has, for example, a flange shape.
  • the first convex portion 52a is provided so as to be in contact with the end portion of the pressure damping member 56 on the support surface 40y side.
  • the first convex portion 52a defines, for example, the position of the retreat limit of the pressure pin 52. When the first convex portion 52a comes into contact with the main body portion 40, the retreat of the pressure pin 52 is stopped.
  • the pressurizing pin 52 has a function of pressurizing a part of the molten metal after the molten metal filled in the cavity Ca starts solidifying at the time of manufacturing the die-cast product.
  • the pressurizing pin 52 has, for example, a function of pressurizing a part of the molten metal in the product area.
  • the actuator 54 is provided on the side of the support surface 40y of the main body 40.
  • the actuator 54 is fixed to, for example, the support surface 40y.
  • the actuator 54 is, for example, a hydraulic pressure device.
  • the actuator 54 is, for example, a hydraulic device.
  • the piston 54b is slidably provided in the cylinder 54a.
  • a pressure pin 52 is fixed to the main body 40 side of the piston 54b.
  • a position sensor rod 54c is fixed to the side of the piston 54b opposite to the pressure pin 52.
  • the actuator 54 has a function of driving the pressure pin 52.
  • the pressure damping member 56 is provided between the pressure pin 52 and the main body 40 so as to surround the pressure pin. One end of the pressure damping member 56 is exposed on the side of the molding surface 40x of the main body 40. One end of the pressure damping member 56 is exposed to the cavity Ca of the molding surface 40x. The other end of the pressure pin 52 can come into contact with, for example, the first convex portion 52a of the pressure pin 52.
  • the pressure damping member 56 has, for example, a cylindrical shape.
  • the diameter of the outer circumference of the pressure damping member 56 is, for example, 30 mm or more and 50 mm or less.
  • At least a part of the pressure damping member 56 is surrounded by the main body 40.
  • the pressure damping member 56 is slidably provided with respect to the pressure pin 52 and the main body 40.
  • the second convex portion 56a is a part of the pressure damping member 56.
  • the second convex portion 56a has, for example, a flange shape.
  • the end portion of the second convex portion 56a on the molding surface 40x side is provided so as to be in contact with the main body portion 40, for example.
  • the end of the second convex portion 56a on the support surface 40y side comes into contact with, for example, the disc spring 62.
  • the second convex portion 56a defines the position of the forward limit of the pressure damping member 56. When the second convex portion 56a comes into contact with the main body portion 40, the pressure damping member 56 stops advancing.
  • the pressure damping member 56 has a function of reducing the surge pressure generated in the molten metal during the production of die-cast products.
  • the first seal member 58 is provided between the pressure damping member 56 and the main body portion 40.
  • the first seal member 58 is an annular shape surrounding the pressure damping member 56.
  • the first seal member 58 is fixed to, for example, the pressure damping member 56.
  • the first sealing member 58 is a material having high heat resistance.
  • the first sealing member 58 is, for example, a metal.
  • the first sealing member 58 includes, for example, cast iron or steel.
  • the first seal member 58 has a function of suppressing the intrusion of molten metal between the pressure damping member 56 and the main body 40.
  • the second seal member 60 is provided between the pressure pin 52 and the pressure damping member 56.
  • the second sealing member 60 is an annular shape surrounding the pressure pin 52.
  • the second seal member 60 is fixed to, for example, the pressure damping member 56.
  • the second sealing member 60 is a material having high heat resistance.
  • the second sealing member 60 is, for example, metal.
  • the second sealing member 60 includes, for example, cast iron or steel.
  • the second seal member 60 has a function of suppressing the intrusion of molten metal between the pressure pin 52 and the pressure damping member 56.
  • the disc spring 62 is provided between the pressure damping member 56 and the support surface 40y.
  • the disc spring 62 is provided between the pressure damping member 56 and the main body 40.
  • the disc spring 62 is provided between the second convex portion 56a and the support surface 40y.
  • the disc spring 62 is provided between the second convex portion 56a and the main body portion 40.
  • a plurality of disc springs 62 are combined in series, for example.
  • the disc spring 62 has a function of absorbing the surge pressure generated in the molten metal by bending during the production of the die-cast product.
  • the position sensor 64 is provided in the vicinity of the position sensor rod 54c.
  • the position sensor 64 has a function of detecting the position of the position sensor rod 54c.
  • the position sensor 64 indirectly monitors the position of the pressurizing pin 52 by detecting the position of the position sensor rod 54c.
  • the position sensor 64 is, for example, an optical or magnetic linear encoder.
  • FIG. 4 are explanatory views of the operation of the local pressurizing device of the first embodiment.
  • the fixed type 18a and the movable type 18b are separated from each other (Fig. 3).
  • the first convex portion 52a of the pressure pin 52 is in contact with, for example, the main body portion 40.
  • the pressure pin 52 is in the position of the retreat limit.
  • the pressure damping member 56 is in the forward limit position.
  • the movable die plate 26 is moved, and the movable mold 18b fixed to the movable die plate 26 is brought into contact with the fixed mold 18a (FIG. 4).
  • a cavity Ca is formed between the movable mold 18b and the fixed mold 18a.
  • the movable mold 18b and the fixed mold 18a are mold-fastened using the mold clamping device 10.
  • the molten metal 70 is filled in the cavity Ca of the mold 18 using the injection device 14 (FIG. 5). Pressure is applied to the molten metal 70 by the injection device 14, and the pressure of the molten metal 70 rises.
  • the pressure damping member 56 advances due to the elastic force of the disc spring 62.
  • the advance of the pressure damping member 56 stops when the second convex portion 56a comes into contact with the main body portion 40 (FIG. 7).
  • the position where the second convex portion 56a is in contact with the main body portion 40 is the forward limit of the pressure damping member 56.
  • the pressurizing pin 52 is advanced by using the actuator 54 (FIG. 8). A part of the molten metal 70 that has started solidification is pressurized by the pressure pin 52.
  • the timing at which the pressurizing pin 52 starts advancing is linked with, for example, a change in the injection speed of the injection device 14.
  • the timing at which the advancement of the pressurizing pin 52 is started is controlled, for example, by the control device 32 controlling the local pressurizing device 50.
  • the amount of advance of the pressurizing pin 52 can be controlled, for example, by monitoring the position of the pressurizing pin 52 with the position sensor 64.
  • the amount of advance of the pressurizing pin 52 is controlled, for example, by the control device 32 controlling the local pressurizing device 50.
  • the mold is opened using the mold clamping device 10.
  • the produced die-cast product is extruded from the movable mold 18b using the extruder 12.
  • the pressurizing pin 52 is retracted to the retracting limit by using, for example, an actuator 54 (FIG. 9).
  • the actuator 54 is used to advance the pressure pin 52 (FIG. 10).
  • the pressure pin 52 is advanced to, for example, the advance limit.
  • the position where the first convex portion 52a of the pressure pin 52 is in contact with the pressure damping member 56 is the advance limit of the pressure pin 52.
  • the pressure damping member 56 has not returned to the forward limit due to the molten metal 70 entering between the pressure damping member 56 and the main body 40 and solidifying. Even in this case, the pressure damping member 56 can be returned to the forward limit by pushing the pressure damping member 56 with the pressure pin 52.
  • the fixed type 18a of the first embodiment includes a local pressurizing device 50. After the molten metal 70 starts solidifying in the mold 18, the molten metal 70 can be locally pressurized by pushing the pressurizing pin 52 of the local pressurizing device 50 into the molten metal 70.
  • FIG. 11 is a graph showing an example of the operation of the molding machine of the first embodiment.
  • the horizontal axis is time.
  • the plotted points are located on the right side of the paper.
  • the vertical axis on the left side of the paper shows the injection speed, that is, the speed of the injection plunger of the injection device.
  • the vertical axis on the right side of the paper shows the pressure applied to the molten metal in the cavity Ca.
  • the solid line Cv is the speed of the injection plunger.
  • the dotted line Cp0 and the solid line Cp1 are the pressures applied to the molten metal.
  • the dotted line Cp0 is the case where the mold for the molding machine of the comparative example is used
  • the solid line Cp1 is the case where the mold for the molding machine of the first embodiment is used.
  • the molding machine mold of the comparative example is different from the molding machine mold of the first embodiment in that the local pressurizing device 50 is not provided.
  • the middle dotted line Cx in FIG. 11 is a burr-blown critical curve. If the pressure applied to the molten metal exceeds the burr blowing critical curve, the pressure applied to the molten metal may exceed the mold clamping force and burr blowing may occur.
  • the injection speed is low from the viewpoint of suppressing the entrainment of gas in the molten metal.
  • the injection speed is increased from the middle to shorten the filling time of the molten metal into the cavity.
  • burr blowing occurs, for example, the quality of the die-cast product deteriorates and it becomes a defective product. It can also be a major safety issue, for example.
  • the molding machine mold of the first embodiment that is, the fixed mold 18a includes a local pressurizing device 50.
  • the local pressurizing device 50 includes a pressure damping member 56.
  • the pressure damping member 56 retracts and the pressure applied to the molten metal is attenuated. Therefore, as shown by the solid line Cp1, the surge pressure is reduced. Therefore, the quality of the die-cast product is improved by using the mold for the molding machine of the first embodiment.
  • the local pressurizing device 50 preferably has a first sealing member 58.
  • first sealing member 58 For example, when the molten metal 70 invades between the pressure damping member 56 and the main body 40 and solidifies, the movement of the pressure damping member 56 is hindered. In particular, when the molten metal 70 penetrates into the region where the disc spring 62 is provided and solidifies, the pressure damping member 56 does not function at all.
  • the molten metal 70 is suppressed from entering between the pressure damping member 56 and the main body portion 40, and the reliability of the operation of the local pressurizing device 50 is improved.
  • the pressure pin 52 has a first convex portion 52a.
  • the first convex portion 52a makes it possible to push the pressure damping member 56. For example, consider a case where the pressure damping member 56 has not returned to the forward limit due to the molten metal 70 entering between the pressure damping member 56 and the main body 40 and solidifying. Even in this case, the pressure damping member 56 can be returned to the forward limit by pushing the pressure damping member 56 with the first convex portion 52a. Therefore, the reliability of the operation of the local pressurizing device 50 is improved.
  • the local pressurizing device 50 preferably has a second sealing member 60.
  • the local pressurizing device 50 preferably has a second sealing member 60.
  • the second seal member 60 By providing the second seal member 60, the molten metal 70 is suppressed from entering between the pressurizing pin 52 and the pressure damping member 56, and the reliability of the operation of the local pressurizing device 50 is improved.
  • the elastic body of the local pressurizing device 50 is preferably a disc spring 62.
  • the disc spring 62 By using the disc spring 62, it is possible to absorb a high pressure with a short displacement amount.
  • the local pressurizing device 50 integrates a local pressurizing mechanism using the pressurizing pin 52 and a surge pressure reducing mechanism using the pressure damping member 56 to form a local pressurizing mechanism and a surge pressure reducing mechanism. It is possible to realize miniaturization.
  • one end of the pressure pin when the pressure pin is located at the retracting limit is supported more than one end of the pressure damping member when the pressure damping member is located at the forward limit. It differs from the molding machine mold of the first embodiment in that it is on the side of the surface. Further, the molding machine of the second embodiment is different from the molding machine of the first embodiment in that it is provided with the above-mentioned mold. Hereinafter, some descriptions may be omitted for the contents that overlap with the first embodiment.
  • FIG. 12 is a schematic cross-sectional view of the mold for a molding machine according to the second embodiment.
  • FIG. 12 shows a state in which the fixed mold 18a and the movable mold 18b are in contact with each other, in other words, a state in which the fixed mold 18a and the movable mold 18b are molded.
  • the region sandwiched between the fixed mold 18a and the movable mold 18b is the cavity Ca.
  • the fixed type 18a includes a main body portion 40 and a local pressurizing device 50. At least a part of the local pressurizing device 50 is incorporated in the main body 40.
  • the main body portion 40 has a molding surface 40x and a support surface 40y.
  • the support surface 40y faces the molding surface 40x.
  • the molded surface 40x is a surface on the side of the cavity Ca.
  • the support surface 40y is a surface on the side of the fixed die plate 24.
  • the local pressurizing device 50 includes a pressurizing pin 52, an actuator 54, a pressure damping member 56, a first sealing member 58, a second sealing member 60, a disc spring 62 (elastic body), and a position sensor 64.
  • the pressure pin 52 has a first convex portion 52a (convex portion).
  • the actuator 54 has a cylinder 54a, a piston 54b, a position sensor rod 54c, a rod side chamber 54x, and a cap side chamber 54y.
  • the pressure damping member 56 has a second convex portion 56a.
  • the disc spring 62 is an example of an elastic body.
  • the first convex portion 52a is an example of the convex portion.
  • FIG. 13 is a schematic cross-sectional view of the mold for a molding machine according to the second embodiment.
  • FIG. 13 shows a state in which the pressure pin 52 is located at the retracting limit.
  • FIG. 13 shows a state in which the pressure damping member 56 is located at the forward limit.
  • the position of the retreat limit of the pressure pin 52 is defined by the position where the first convex portion 52a comes into contact with the main body portion 40.
  • the position of the forward limit of the pressure damping member 56 is defined by the position where the second convex portion 56a comes into contact with the main body portion 40.
  • one end of the pressure pin 52 on the cavity Ca side when the pressure pin 52 is located in the backward limit is the cavity Ca of the pressure damping member 56 when the pressure damping member 56 is located in the forward limit. It is on the side of the support surface 40y with respect to one end of the side. In other words, the end of the pressure pin 52 on the cavity Ca side is closer to the support surface 40y than the end of the pressure damping member 56 on the cavity Ca side.
  • FIG. 15 FIG. 16, FIG. 17, FIG. 18, FIG. 19, FIG. 20, and FIG. 21 are explanatory views of the operation of the local pressurizing device of the second embodiment.
  • the fixed type 18a and the movable type 18b are separated from each other (FIG. 14).
  • the first convex portion 52a of the pressure pin 52 is located, for example, at a position between the pressure damping member 56 and the main body portion 40.
  • the pressure damping member 56 is in the forward limit position.
  • the movable die plate 26 is moved, and the movable mold 18b fixed to the movable die plate 26 is brought into contact with the fixed mold 18a (FIG. 15).
  • a cavity Ca is formed between the movable mold 18b and the fixed mold 18a.
  • the movable mold 18b and the fixed mold 18a are mold-fastened using the mold clamping device 10.
  • the molten metal 70 is filled in the cavity Ca of the mold 18 using the injection device 14 (FIG. 16). Pressure is applied to the molten metal 70 by the injection device 14, and the pressure of the molten metal 70 rises.
  • the pressure damping member 56 retracts due to the pressure of the molten metal 70.
  • the disc spring 62 bends and absorbs the pressure of the molten metal 70.
  • the pressure of the molten metal 70 and the elastic force of the disc spring 62 are balanced, the retreat of the pressure damping member 56 stops.
  • the pressure pin 52 retracts due to the pressure of the molten metal 70.
  • the hydraulic oil in the cap side chamber 54y is compressed and absorbs the pressure of the molten metal 70.
  • the retreat of the pressurizing pin 52 stops (FIG. 17).
  • the pressure damping member 56 advances due to the elastic force of the disc spring 62.
  • the advance of the pressure damping member 56 stops when the second convex portion 56a comes into contact with the main body portion 40.
  • the position where the second convex portion 56a is in contact with the main body portion 40 is the forward limit of the pressure damping member 56.
  • the pressurizing pin 52 is advanced by using the actuator 54 (FIG. 18).
  • the timing for starting the advancement of the pressurizing pin 52 is based on, for example, the measurement result of the position sensor 64.
  • the position sensor 64 detects the retreat of the pressurizing pin 52 due to the pressure of the molten metal 70, and the pressurizing pin 52 is advanced after a predetermined time has elapsed from the retreating of the pressurizing pin 52.
  • the timing at which the advance of the pressurizing pin 52 is started is controlled, for example, by the control device 32 controlling the local pressurizing device 50 based on the measurement result of the position sensor 64.
  • the pressurizing pin 52 is further advanced by using the actuator 54 (FIG. 19). A part of the molten metal 70 that has started solidification is pressurized by the pressure pin 52.
  • the timing at which the advancement of the pressurizing pin 52 is started is controlled, for example, by the control device 32 controlling the local pressurizing device 50.
  • the amount of advance of the pressurizing pin 52 can be controlled, for example, by monitoring the position of the pressurizing pin 52 with the position sensor 64.
  • the amount of advance of the pressurizing pin 52 is controlled, for example, by the control device 32 controlling the local pressurizing device 50.
  • the mold is opened using the mold clamping device 10.
  • the produced die-cast product is extruded from the movable mold 18b using the extruder 12.
  • the pressure pin 52 is retracted using, for example, an actuator 54 (FIG. 20).
  • the actuator 54 is used to advance the pressure pin 52 (FIG. 21).
  • the pressure pin 52 is advanced to, for example, the advance limit.
  • the position where the first convex portion 52a of the pressure pin 52 is in contact with the pressure damping member 56 is the advance limit of the pressure pin 52.
  • the pressure damping member 56 has not returned to the forward limit due to the molten metal 70 entering between the pressure damping member 56 and the main body 40 and solidifying. Even in this case, the pressure damping member 56 can be returned to the forward limit by pushing the pressure damping member 56 with the pressure pin 52.
  • the shrinkage cavities can be suppressed by providing the local pressurizing device 50 as in the first embodiment. Therefore, according to the fixed type 18a and the die casting machine 100 of the second embodiment, it is possible to improve the quality of the die casting product.
  • the molding machine mold of the second embodiment that is, the fixed mold 18a includes a local pressurizing device 50.
  • the local pressurizing device 50 includes a pressure damping member 56.
  • the surge pressure is reduced as in the first embodiment. Further, when the molten metal 70 is filled in the cavity Ca of the mold 18, when the pressure applied to the molten metal increases, the pressure pin 52 also retracts. By retracting the pressure pin 52 in addition to the pressure damping member 56, the surge pressure is further reduced. Therefore, the quality of the die-cast product is improved by using the mold for the molding machine of the second embodiment.
  • the second embodiment it is possible to set the timing at which the advancement of the pressure pin 52 is started by detecting the retreat of the pressure pin 52 with the position sensor 64. Therefore, it is possible to set the timing of pressurizing the molten metal 70 to the optimum timing. Therefore, by using the mold for the molding machine of the second embodiment, the quality of the die-cast product is further improved.
  • the mold for the molding machine of the present invention is the fixed mold 18a
  • the mold for the molding machine of the present invention is the movable mold 18b. It doesn't matter. That is, the movable type 18b may be configured to include the local pressurizing device 50.
  • the local pressurizing device 50 pressurizes the product area of the cavity Ca
  • the local pressurizing device 50 adds the non-product area of the cavity Ca. It is also possible to have a configuration that presses. Non-product areas are, for example, runners, overflows, air vents, and the like.
  • the elastic body is a disc spring 62
  • the elastic body may be a coil spring or a leaf spring other than the disc spring 62, for example. ..
  • the case where one local pressurizing device 50 is provided in the molding machine mold has been described as an example, but a plurality of local pressurizing devices are provided in the molding machine mold. It is also possible to provide 50.
  • the die casting machine has been described as an example of a molding machine, but the present invention can also be applied to an injection molding machine or the like.
  • Main body 40 40 x Molded surface 40y Support surface 50 Local pressurizing device 52 Pressurizing pin 52a First convex portion (convex portion) 54 Actuator 56 Pressure damping member 58 First sealing member 60 Second sealing member 62 Belleville spring (elastic body) 64 Position sensor 100 Die casting machine Ca Cavity

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Presses And Accessory Devices Thereof (AREA)

Abstract

A die for a molding machine of an embodiment comprises a body unit having a molding surface and a support surface facing the molding surface, and a local pressurization device which is at least partly incorporated into the body unit. The local pressurization device includes: a pressure pin having one end exposed to the molding surface side of the body unit; an actuator which is installed on the support surface side of the body unit, and drives the pressure pin; a pressure damping member which is installed between the pressure pin and the body unit to surround the pressure pin, and has one end exposed to the molding surface side of the body unit; and an elastic body installed between the pressure damping member and the support surface.

Description

成形機用金型及び成形機Molds for molding machines and molding machines
　本発明は、金型内の空洞に射出装置を用いて溶湯を充填することで成形品を製造する成形機用金型、及び成形機に関する。 The present invention relates to a mold for a molding machine that manufactures a molded product by filling a cavity in a mold with molten metal using an injection device, and a molding machine.
　成形機の一例であるダイカストマシンは、型締装置を用いて型締めされた金型内の空洞（キャビティ）に、射出装置を用いて溶湯を充填することで、成形品（ダイカスト品）を製造する。ダイカストマシンでは、特に成形品の大型化や薄肉化に対応するために、金型内の空洞に短時間で溶湯を充填することが要求される。 A die casting machine, which is an example of a molding machine, manufactures a molded product (die casting product) by filling a cavity in a mold that has been molded using a mold clamping device with molten metal using an injection device. do. In die casting machines, it is required to fill the cavity in the mold with molten metal in a short time, especially in order to cope with the increase in size and thinning of the molded product.
　短時間で溶湯を充填するために、射出装置の射出速度を高速化する必要がある。しかし、射出速度を高速化すると、射出プランジャの慣性力によって溶湯に生じるサージ圧により、バリが吹きやすくなるという問題が生じる。したがって、サージ圧の低減を実現することが望まれる。 In order to fill the molten metal in a short time, it is necessary to increase the injection speed of the injection device. However, when the injection speed is increased, there arises a problem that burrs are easily blown due to the surge pressure generated in the molten metal due to the inertial force of the injection plunger. Therefore, it is desired to reduce the surge pressure.
　また、成形品の品質を向上させるために、成形品の内部の引け巣を抑制することが望まれる。引け巣を抑制する方法として、例えば、溶湯が金型内で凝固を開始してから、金型に設けた加圧ピンを成形品に押し込む局部加圧法がある。 Further, in order to improve the quality of the molded product, it is desired to suppress the shrinkage cavity inside the molded product. As a method of suppressing shrinkage cavities, for example, there is a local pressurization method in which a pressurizing pin provided on the die is pushed into a molded product after the molten metal starts solidifying in the die.
　特許文献１には、ばねを用いて溶湯に生じるサージ圧を減衰する圧力減衰装置が記載されている。また、特許文献２には、ばねの力を用いて加圧ピンを成形品に押し込む局部加圧装置が記載されている。 Patent Document 1 describes a pressure damping device that uses a spring to attenuate the surge pressure generated in the molten metal. Further, Patent Document 2 describes a local pressurizing device that pushes a pressurizing pin into a molded product by using the force of a spring.
特公昭５９－２５８０号公報Special Publication No. 59-2580 実開平２－８１７４８号公報Jikkenhei 2-81748 Gazette
　本発明が解決しようとする課題は、サージ圧を低減できる局部加圧装置を備えた成形機用金型及び成形機を提供することである。 An object to be solved by the present invention is to provide a mold for a molding machine and a molding machine provided with a local pressurizing device capable of reducing surge pressure.
　本発明の一態様の成形機用金型は、成形面と前記成形面に対向する支持面を有する本体部と、少なくとも一部が前記本体部に組み込まれた局部加圧装置と、を備え、前記局部加圧装置は、一端が前記本体部の前記成形面の側に露出する加圧ピンと、前記本体部の前記支持面の側に設けられ、前記加圧ピンを駆動するアクチュエータと、前記加圧ピンと前記本体部との間に前記加圧ピンを囲んで設けられ、一端が前記本体部の前記成形面の側に露出する圧力減衰部材と、前記圧力減衰部材と前記支持面との間に設けられた弾性体と、を含む。 The molding machine mold of one aspect of the present invention includes a main body portion having a molding surface and a support surface facing the molding surface, and a local pressurizing device having at least a part incorporated in the main body portion. The local pressurizing device includes a pressurizing pin whose one end is exposed on the side of the molding surface of the main body, an actuator provided on the side of the support surface of the main body and driving the pressurizing pin, and the addition. A pressure damping member provided between the pressure pin and the main body portion so as to surround the pressure pin and one end of which is exposed on the side of the molding surface of the main body portion, and between the pressure damping member and the support surface. Including the provided elastic body.
　上記態様の成形機用金型において、前記局部加圧装置は、前記圧力減衰部材と前記本体部との間に前記圧力減衰部材を囲んで設けられた環状の第１のシール部材を、更に含むことが好ましい。 In the mold for a molding machine of the above aspect, the local pressurizing device further includes an annular first sealing member provided between the pressure damping member and the main body portion so as to surround the pressure damping member. Is preferable.
　上記態様の成形機用金型において、前記第１のシール部材は鋳鉄又はスチールを含むことが好ましい。 In the molding machine mold of the above aspect, it is preferable that the first sealing member contains cast iron or steel.
　上記態様の成形機用金型において、前記局部加圧装置は、前記加圧ピンと前記圧力減衰部材との間に前記加圧ピンを囲んで設けられた環状の第２のシール部材を、更に含むことが好ましい。 In the molding machine mold of the above aspect, the local pressurizing device further includes an annular second sealing member provided between the pressurizing pin and the pressure damping member so as to surround the pressurizing pin. Is preferable.
　上記態様の成形機用金型において、前記加圧ピンは前記圧力減衰部材の他端に接触可能な環状の凸部を有することが好ましい。 In the molding machine mold of the above aspect, it is preferable that the pressure pin has an annular convex portion that can be contacted with the other end of the pressure damping member.
　上記態様の成形機用金型において、前記加圧ピンの位置をモニタする位置センサを、更に備えることが好ましい。 It is preferable that the molding machine mold of the above aspect further includes a position sensor that monitors the position of the pressure pin.
　上記態様の成形機用金型において、前記弾性体は皿ばねであることが好ましい。 In the molding machine mold of the above aspect, it is preferable that the elastic body is a disc spring.
　上記態様の成形機用金型において、前記加圧ピンが後退限に位置する場合の前記加圧ピンの前記一端は、前記圧力減衰部材が前進限に位置する場合の前記圧力減衰部材の前記一端と面一か前記成形面の側に突出した位置にあることが好ましい。 In the molding machine mold of the above aspect, the one end of the pressure pin when the pressure pin is located in the retracting limit is the one end of the pressure damping member when the pressure damping member is located in the forward limit. It is preferable that the position is flush with the surface or protrudes toward the molding surface.
　上記態様の成形機用金型において、前記加圧ピンが後退限に位置する場合の前記加圧ピンの前記一端は、前記圧力減衰部材が前進限に位置する場合の前記圧力減衰部材の前記一端よりも前記支持面の側にあることが好ましい。 In the molding machine mold of the above aspect, the one end of the pressure pin when the pressure pin is located in the retracting limit is the one end of the pressure damping member when the pressure damping member is located in the forward limit. It is preferable that it is on the side of the support surface.
　本発明の一態様の成形機は、上記態様の成形機用金型を備える。 The molding machine according to one aspect of the present invention includes a mold for the molding machine according to the above aspect.
　本発明によれば、サージ圧を低減できる局部加圧装置を備えた成形機用金型及び成形機を提供することができる。 According to the present invention, it is possible to provide a molding machine mold and a molding machine provided with a local pressurizing device capable of reducing surge pressure.
第１の実施形態の成形機の全体構成を示す模式図。The schematic diagram which shows the whole structure of the molding machine of 1st Embodiment. 第１の実施形態の成形機用金型の模式断面図。The schematic sectional view of the mold for a molding machine of 1st Embodiment. 第１の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of 1st Embodiment. 第１の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of 1st Embodiment. 第１の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of 1st Embodiment. 第１の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of 1st Embodiment. 第１の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of 1st Embodiment. 第１の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of 1st Embodiment. 第１の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of 1st Embodiment. 第１の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of 1st Embodiment. 第１の実施形態の成形機の動作の一例を示すグラフ。The graph which shows an example of the operation of the molding machine of 1st Embodiment. 第２の実施形態の成形機用金型の模式断面図。The schematic sectional view of the mold for a molding machine of 2nd Embodiment. 第２の実施形態の成形機用金型の模式断面図。The schematic sectional view of the mold for a molding machine of 2nd Embodiment. 第２の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment. 第２の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment. 第２の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment. 第２の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment. 第２の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment. 第２の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment. 第２の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment. 第２の実施形態の局部加圧装置の動作の説明図。The explanatory view of the operation of the local pressurizing apparatus of the 2nd Embodiment.
　以下、本発明の実施形態について図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　なお、本明細書では、液圧の一例として、油圧を用いて説明する。例えば、液圧回路の一例として油圧回路、液圧アクチュエータの一例として油圧アクチュエータ、液圧装置の一例として油圧装置を用いて説明する。油圧にかえて、例えば、水圧を用いることも可能である。また、本明細書では、作動液の一例として、作動油を用いて説明する。 In this specification, hydraulic pressure will be used as an example of hydraulic pressure. For example, a hydraulic circuit will be described as an example of a hydraulic circuit, a hydraulic actuator as an example of a hydraulic actuator, and a hydraulic device as an example of a hydraulic device. For example, water pressure can be used instead of hydraulic pressure. Further, in the present specification, a hydraulic fluid will be used as an example of the hydraulic fluid.
（第１の実施形態）
　第１の実施形態の成形機用金型は、成形面と成形面に対向する支持面を有する本体部と、少なくとも一部が本体部に組み込まれた局部加圧装置と、を備え、局部加圧装置は、一端が本体部の成形面の側に露出する加圧ピンと、本体部の支持面の側に設けられ、加圧ピンを駆動するアクチュエータと、加圧ピンと本体部との間に加圧ピンを囲んで設けられ、一端が本体部の成形面の側に露出する圧力減衰部材と、圧力減衰部材と支持面との間に設けられた弾性体と、を含む。第１の実施形態の成形機用金型は、加圧ピンが後退限に位置する場合の加圧ピンの一端は、圧力減衰部材が前進限に位置する場合の圧力減衰部材の一端と面一か成形面の側に突出した位置にある。 (First Embodiment)
The molding machine mold of the first embodiment includes a main body portion having a molding surface and a support surface facing the molding surface, and a local pressurizing device having at least a part incorporated in the main body portion. The pressure device is provided between a pressure pin whose one end is exposed on the molding surface side of the main body, an actuator provided on the support surface side of the main body to drive the pressure pin, and the pressure pin and the main body. It includes a pressure damping member provided around the pressure pin and one end of which is exposed on the molding surface side of the main body portion, and an elastic body provided between the pressure damping member and the support surface. In the molding machine mold of the first embodiment, one end of the pressure pin when the pressure pin is located at the retracting limit is flush with one end of the pressure damping member when the pressure damping member is located at the forward limit. It is in a position protruding toward the molding surface.
　また、第１の実施形態の成形機は、上記構成の成形機用金型を備える。 Further, the molding machine of the first embodiment includes a molding machine mold having the above configuration.
　図１は、第１の実施形態の成形機の全体構成を示す模式図である。図１は、一部に断面図を含む側面図である。第１の実施形態の成形機は、ダイカストマシン１００である。ダイカストマシン１００は、コールドチャンバ式のダイカストマシンである。 FIG. 1 is a schematic diagram showing the overall configuration of the molding machine of the first embodiment. FIG. 1 is a side view including a cross-sectional view in part. The molding machine of the first embodiment is a die casting machine 100. The die casting machine 100 is a cold chamber type die casting machine.
　ダイカストマシン１００は、型締装置１０、押出装置１２、射出装置１４、金型１８、制御ユニット２０、ベース２２、固定ダイプレート２４、可動ダイプレート２６、リンクハウジング２８、及びタイバー３０を備える。 The die casting machine 100 includes a mold clamping device 10, an extrusion device 12, an injection device 14, a mold 18, a control unit 20, a base 22, a fixed die plate 24, a movable die plate 26, a link housing 28, and a tie bar 30.
　ダイカストマシン１００は、金型１８の内部（図１中の空洞Ｃａ）に液状金属（溶湯）を射出して充填し、その液状金属を金型１８内で凝固させることにより、ダイカスト品を製造する機械である。金属は、例えば、アルミニウム、アルミニウム合金、亜鉛合金、又は、マグネシウム合金である。 The die casting machine 100 manufactures a die cast product by injecting a liquid metal (molten metal) into the inside of the mold 18 (cavity Ca in FIG. 1) to fill the mold 18 and solidifying the liquid metal in the mold 18. It is a machine. The metal is, for example, aluminum, an aluminum alloy, a zinc alloy, or a magnesium alloy.
　金型１８は、固定型１８ａと可動型１８ｂを含む。金型１８は、型締装置１０と射出装置１４との間に設けられる。 The mold 18 includes a fixed mold 18a and a movable mold 18b. The mold 18 is provided between the mold clamping device 10 and the injection device 14.
　固定型１８ａは、本体部４０と局部加圧装置５０を備える。固定型１８ａは、第１の実施形態の成形機用金型の一例である。 The fixed type 18a includes a main body 40 and a local pressurizing device 50. The fixed mold 18a is an example of a mold for a molding machine according to the first embodiment.
　固定ダイプレート２４はベース２２の上に固定される。固定ダイプレート２４は、固定型１８ａを保持することが可能である。 The fixed die plate 24 is fixed on the base 22. The fixed die plate 24 can hold the fixed mold 18a.
　可動ダイプレート２６は、ベース２２の上に型開閉方向に移動可能に設けられる。型開閉方向とは、図１に示す型開方向及び型閉方向の両方向を意味する。可動ダイプレート２６は、可動型１８ｂを固定型１８ａに対向して保持することが可能である。 The movable die plate 26 is provided on the base 22 so as to be movable in the mold opening / closing direction. The mold opening / closing direction means both the mold opening direction and the mold closing direction shown in FIG. The movable die plate 26 can hold the movable mold 18b facing the fixed mold 18a.
　リンクハウジング２８は、ベース２２の上に設けられる。リンクハウジング２８には、型締装置１０を構成するリンク機構の一端が固定される。 The link housing 28 is provided on the base 22. One end of the link mechanism constituting the mold clamping device 10 is fixed to the link housing 28.
　固定ダイプレート２４とリンクハウジング２８は、タイバー３０により固定される。タイバー３０は、固定型１８ａと可動型１８ｂに型締力が加えられている間は、型締力を支える。　 The fixed die plate 24 and the link housing 28 are fixed by the tie bar 30. The tie bar 30 supports the mold clamping force while the mold clamping force is applied to the fixed mold 18a and the movable mold 18b. It was
　型締装置１０は、金型１８の開閉及び型締めを行う機能を有する。射出装置１４は、金型１８の空洞Ｃａに溶湯を射出して、金型１８の空洞Ｃａの中に溶湯を充填し、溶湯を加圧する機能を有する。押出装置１２は、製造されたダイカスト品を金型１８から押し出す機能を有する。 The mold clamping device 10 has a function of opening and closing the mold 18 and mold clamping. The injection device 14 has a function of injecting molten metal into the cavity Ca of the mold 18, filling the cavity Ca of the mold 18 with the molten metal, and pressurizing the molten metal. The extruder 12 has a function of extruding the manufactured die-cast product from the mold 18.
　制御ユニット２０は、制御装置３２、入力装置３４、表示装置３６を含む。制御ユニット２０は、型締装置１０、押出装置１２、射出装置１４、及び局部加圧装置５０を用いたダイカストマシン１００の成形動作を制御する機能を有する。 The control unit 20 includes a control device 32, an input device 34, and a display device 36. The control unit 20 has a function of controlling the molding operation of the die casting machine 100 using the mold clamping device 10, the extrusion device 12, the injection device 14, and the local pressurizing device 50.
　入力装置３４は、オペレータの入力操作を受け付ける。オペレータは、入力装置３４を用いて、ダイカストマシン１００の成形条件等の設定が可能となる。入力装置３４は、例えば、液晶ディスプレイ又は有機ＥＬディスプレイを用いたタッチパネルである。 The input device 34 accepts an operator's input operation. The operator can set the molding conditions and the like of the die casting machine 100 by using the input device 34. The input device 34 is, for example, a touch panel using a liquid crystal display or an organic EL display.
　表示装置３６は、例えば、ダイカストマシン１００の成形条件、動作状況等を画面に表示する。表示装置３６は、例えば、液晶ディスプレイ又は有機ＥＬディスプレイである。 The display device 36 displays, for example, the molding conditions, operating status, etc. of the die casting machine 100 on the screen. The display device 36 is, for example, a liquid crystal display or an organic EL display.
　制御装置３２は、各種の演算を行って、ダイカストマシン１００の各部に制御指令を出力する機能を有する。制御装置３２は、例えば、成形条件等を記憶する機能を有する。制御装置３２は、例えば、射出装置１４の動作を制御する。制御装置３２は、例えば、金型１８の空洞Ｃａの中への溶湯の充填状況に基づき、局部加圧装置５０の動作を制御する。 The control device 32 has a function of performing various calculations and outputting control commands to each part of the die casting machine 100. The control device 32 has, for example, a function of storing molding conditions and the like. The control device 32 controls, for example, the operation of the injection device 14. The control device 32 controls the operation of the local pressurizing device 50 based on, for example, the filling status of the molten metal in the cavity Ca of the mold 18.
　制御装置３２は、例えば、ハードウェアとソフトウェアとの組み合わせで構成される。制御装置３２は、例えば、ＣＰＵ（Ｃｅｎｔｒａｌ　Ｐｒｏｃｅｓｓｉｎｇ　Ｕｎｉｔ）、半導体メモリ、及び半導体メモリに記憶された制御プログラムを含む。 The control device 32 is composed of, for example, a combination of hardware and software. The control device 32 includes, for example, a CPU (Central Processing Unit), a semiconductor memory, and a control program stored in the semiconductor memory.
　図２は、第１の実施形態の成形機用金型の模式断面図である。図２は、固定型１８ａと可動型１８ｂとが接触した状態、言い換えれば、固定型１８ａと可動型１８ｂとが型締めされた状態を示す。固定型１８ａと可動型１８ｂで挟まれた領域が、空洞Ｃａである。 FIG. 2 is a schematic cross-sectional view of the mold for a molding machine according to the first embodiment. FIG. 2 shows a state in which the fixed mold 18a and the movable mold 18b are in contact with each other, in other words, a state in which the fixed mold 18a and the movable mold 18b are molded. The region sandwiched between the fixed mold 18a and the movable mold 18b is the cavity Ca.
　固定型１８ａは、本体部４０と局部加圧装置５０を含む。局部加圧装置５０の少なくとも一部は、本体部４０に組み込まれる。 The fixed type 18a includes a main body portion 40 and a local pressurizing device 50. At least a part of the local pressurizing device 50 is incorporated in the main body 40.
　本体部４０は、成形面４０ｘと支持面４０ｙを有する。支持面４０ｙは成形面４０ｘに対向する。成形面４０ｘは、空洞Ｃａの側の面である。支持面４０ｙは固定ダイプレート２４の側の面である。 The main body portion 40 has a molding surface 40x and a support surface 40y. The support surface 40y faces the molding surface 40x. The molded surface 40x is a surface on the side of the cavity Ca. The support surface 40y is a surface on the side of the fixed die plate 24.
　局部加圧装置５０は、加圧ピン５２、アクチュエータ５４、圧力減衰部材５６、第１のシール部材５８、第２のシール部材６０、皿ばね６２（弾性体）、及び位置センサ６４を含む。加圧ピン５２は、第１の凸部５２ａ（凸部）を有する。アクチュエータ５４は、シリンダ５４ａ、ピストン５４ｂ、位置センサ用ロッド５４ｃ、ロッド側室５４ｘ、キャップ側室５４ｙを有する。圧力減衰部材５６は、第２の凸部５６ａを有する。 The local pressurizing device 50 includes a pressurizing pin 52, an actuator 54, a pressure damping member 56, a first sealing member 58, a second sealing member 60, a disc spring 62 (elastic body), and a position sensor 64. The pressure pin 52 has a first convex portion 52a (convex portion). The actuator 54 has a cylinder 54a, a piston 54b, a position sensor rod 54c, a rod side chamber 54x, and a cap side chamber 54y. The pressure damping member 56 has a second convex portion 56a.
　皿ばね６２は、弾性体の一例である。第１の凸部５２ａは、凸部の一例である。 The disc spring 62 is an example of an elastic body. The first convex portion 52a is an example of the convex portion.
　加圧ピン５２は、成形面４０ｘから支持面４０ｙに向かう方向に伸長する。加圧ピン５２は、型開閉方向に伸長する。 The pressure pin 52 extends in the direction from the molded surface 40x toward the support surface 40y. The pressure pin 52 extends in the mold opening / closing direction.
　加圧ピン５２は、一端が本体部４０の成形面４０ｘの側に露出する。加圧ピン５２の一端は、空洞Ｃａに突出可能に設けられる。加圧ピン５２の他端は支持面４０ｙの側に設けられる。加圧ピン５２の他端は、例えば、アクチュエータ５４のピストン５４ｂに固定される。 One end of the pressure pin 52 is exposed on the side of the molding surface 40x of the main body 40. One end of the pressure pin 52 is provided so as to be projectable in the cavity Ca. The other end of the pressure pin 52 is provided on the side of the support surface 40y. The other end of the pressure pin 52 is fixed to, for example, the piston 54b of the actuator 54.
　加圧ピン５２は、例えば、円柱形状である。加圧ピン５２の直径は、例えば、１０ｍｍ以上３０ｍｍ以下である。 The pressure pin 52 has, for example, a cylindrical shape. The diameter of the pressure pin 52 is, for example, 10 mm or more and 30 mm or less.
　加圧ピン５２の少なくとも一部は、圧力減衰部材５６に囲まれる。加圧ピン５２の少なくとも一部は、本体部４０に囲まれる。加圧ピン５２は、圧力減衰部材５６に対して、摺動可能に設けられる。 At least a part of the pressure pin 52 is surrounded by the pressure damping member 56. At least a part of the pressure pin 52 is surrounded by the main body 40. The pressure pin 52 is slidably provided with respect to the pressure damping member 56.
　第１の凸部５２ａは、加圧ピン５２の一部である。第１の凸部５２ａは、例えば、円環形状である。第１の凸部５２ａは、例えば、フランジ形状である。第１の凸部５２ａは、圧力減衰部材５６の支持面４０ｙの側の端部に接触可能に設けられる。 The first convex portion 52a is a part of the pressure pin 52. The first convex portion 52a has, for example, an annular shape. The first convex portion 52a has, for example, a flange shape. The first convex portion 52a is provided so as to be in contact with the end portion of the pressure damping member 56 on the support surface 40y side.
　第１の凸部５２ａは、例えば、加圧ピン５２の後退限の位置を規定する。第１の凸部５２ａが本体部４０に接することで、加圧ピン５２の後退が止まる。 The first convex portion 52a defines, for example, the position of the retreat limit of the pressure pin 52. When the first convex portion 52a comes into contact with the main body portion 40, the retreat of the pressure pin 52 is stopped.
　加圧ピン５２は、ダイカスト品の製造時に、空洞Ｃａの中に充填された溶湯が凝固を開始してから、溶湯の一部を加圧する機能を有する。加圧ピン５２は、例えば、製品領域の溶湯の一部を加圧する機能を有する。 The pressurizing pin 52 has a function of pressurizing a part of the molten metal after the molten metal filled in the cavity Ca starts solidifying at the time of manufacturing the die-cast product. The pressurizing pin 52 has, for example, a function of pressurizing a part of the molten metal in the product area.
　アクチュエータ５４は、本体部４０の支持面４０ｙの側に設けられる。アクチュエータ５４は、例えば、支持面４０ｙに固定される。 The actuator 54 is provided on the side of the support surface 40y of the main body 40. The actuator 54 is fixed to, for example, the support surface 40y.
　アクチュエータ５４は、例えば、液圧装置である。アクチュエータ５４は、例えば、油圧装置である。 The actuator 54 is, for example, a hydraulic pressure device. The actuator 54 is, for example, a hydraulic device.
　ピストン５４ｂは、シリンダ５４ａの中を摺動可能に設けられる。ピストン５４ｂの本体部４０側には、加圧ピン５２が固定される。ピストン５４ｂの加圧ピン５２と反対側には、例えば、位置センサ用ロッド５４ｃが固定される。 The piston 54b is slidably provided in the cylinder 54a. A pressure pin 52 is fixed to the main body 40 side of the piston 54b. For example, a position sensor rod 54c is fixed to the side of the piston 54b opposite to the pressure pin 52.
　ロッド側室５４ｘ及びキャップ側室５４ｙには、図示しない油圧回路を用いて作動油を供給することが可能である。また、図示しない油圧回路を用いて作動油を、ロッド側室５４ｘ及びキャップ側室５４ｙから排出することが可能である。 It is possible to supply hydraulic oil to the rod side chamber 54x and the cap side chamber 54y using a hydraulic circuit (not shown). Further, the hydraulic oil can be discharged from the rod side chamber 54x and the cap side chamber 54y by using a hydraulic circuit (not shown).
　アクチュエータ５４は、加圧ピン５２を駆動する機能を有する。 The actuator 54 has a function of driving the pressure pin 52.
　圧力減衰部材５６は、加圧ピン５２と本体部４０との間に加圧ピンを囲んで設けられる。圧力減衰部材５６は、一端が本体部４０の成形面４０ｘの側に露出する。圧力減衰部材５６の一端は、成形面４０ｘの空洞Ｃａに露出する。加圧ピン５２の他端は、例えば、加圧ピン５２の第１の凸部５２ａに接触可能である。 The pressure damping member 56 is provided between the pressure pin 52 and the main body 40 so as to surround the pressure pin. One end of the pressure damping member 56 is exposed on the side of the molding surface 40x of the main body 40. One end of the pressure damping member 56 is exposed to the cavity Ca of the molding surface 40x. The other end of the pressure pin 52 can come into contact with, for example, the first convex portion 52a of the pressure pin 52.
　圧力減衰部材５６は、例えば、円筒形状である。圧力減衰部材５６の外周の直径は、例えば、３０ｍｍ以上５０ｍｍ以下である。 The pressure damping member 56 has, for example, a cylindrical shape. The diameter of the outer circumference of the pressure damping member 56 is, for example, 30 mm or more and 50 mm or less.
　圧力減衰部材５６の少なくとも一部は、本体部４０に囲まれる。圧力減衰部材５６は、加圧ピン５２及び本体部４０に対して摺動可能に設けられる。 At least a part of the pressure damping member 56 is surrounded by the main body 40. The pressure damping member 56 is slidably provided with respect to the pressure pin 52 and the main body 40.
　第２の凸部５６ａは、圧力減衰部材５６の一部である。第２の凸部５６ａは、例えば、フランジ形状である。第２の凸部５６ａの成形面４０ｘ側の端部は、例えば、本体部４０に接触可能に設けられる。第２の凸部５６ａの支持面４０ｙ側の端部は、例えば、皿ばね６２に接触する。 The second convex portion 56a is a part of the pressure damping member 56. The second convex portion 56a has, for example, a flange shape. The end portion of the second convex portion 56a on the molding surface 40x side is provided so as to be in contact with the main body portion 40, for example. The end of the second convex portion 56a on the support surface 40y side comes into contact with, for example, the disc spring 62.
　第２の凸部５６ａは、圧力減衰部材５６の前進限の位置を規定する。第２の凸部５６ａが本体部４０に接触することで、圧力減衰部材５６の前進が止まる。 The second convex portion 56a defines the position of the forward limit of the pressure damping member 56. When the second convex portion 56a comes into contact with the main body portion 40, the pressure damping member 56 stops advancing.
　圧力減衰部材５６は、ダイカスト品の製造時に、溶湯に生じるサージ圧を低減する機能を有する。 The pressure damping member 56 has a function of reducing the surge pressure generated in the molten metal during the production of die-cast products.
　加圧ピン５２が後退限に位置する場合の加圧ピン５２の空洞Ｃａ側の一端は、圧力減衰部材５６が前進限に位置する場合の圧力減衰部材５６の空洞Ｃａ側の一端と面一か成形面４０ｘの側に突出した位置にある。 Is one end of the pressure pin 52 on the cavity Ca side flush with the cavity Ca side of the pressure damping member 56 when the pressure damping member 56 is located in the forward limit? It is in a position protruding toward the molding surface 40x.
　第１のシール部材５８は、圧力減衰部材５６と本体部４０との間に設けられる。第１のシール部材５８は、圧力減衰部材５６を囲む環状である。第１のシール部材５８は、例えば、圧力減衰部材５６に固定される。 The first seal member 58 is provided between the pressure damping member 56 and the main body portion 40. The first seal member 58 is an annular shape surrounding the pressure damping member 56. The first seal member 58 is fixed to, for example, the pressure damping member 56.
　第１のシール部材５８は、耐熱性の高い材料である。第１のシール部材５８は、例えば、金属である。第１のシール部材５８は、例えば、鋳鉄又はスチールを含む。第１のシール部材５８は、圧力減衰部材５６と本体部４０との間に溶湯が侵入することを抑制する機能を有する。 The first sealing member 58 is a material having high heat resistance. The first sealing member 58 is, for example, a metal. The first sealing member 58 includes, for example, cast iron or steel. The first seal member 58 has a function of suppressing the intrusion of molten metal between the pressure damping member 56 and the main body 40.
　第２のシール部材６０は、加圧ピン５２と圧力減衰部材５６との間に設けられる。第２のシール部材６０は、加圧ピン５２を囲む環状である。第２のシール部材６０は、例えば、圧力減衰部材５６に固定される。 The second seal member 60 is provided between the pressure pin 52 and the pressure damping member 56. The second sealing member 60 is an annular shape surrounding the pressure pin 52. The second seal member 60 is fixed to, for example, the pressure damping member 56.
　第２のシール部材６０は、耐熱性の高い材料である。第２のシール部材６０は、例えば、金属である。第２のシール部材６０は、例えば、鋳鉄又はスチールを含む。第２のシール部材６０は、加圧ピン５２と圧力減衰部材５６との間に溶湯が侵入することを抑制する機能を有する。 The second sealing member 60 is a material having high heat resistance. The second sealing member 60 is, for example, metal. The second sealing member 60 includes, for example, cast iron or steel. The second seal member 60 has a function of suppressing the intrusion of molten metal between the pressure pin 52 and the pressure damping member 56.
　皿ばね６２は、圧力減衰部材５６と支持面４０ｙとの間に設けられる。皿ばね６２は、圧力減衰部材５６と本体部４０との間に設けられる。皿ばね６２は、第２の凸部５６ａと支持面４０ｙとの間に設けられる。皿ばね６２は、第２の凸部５６ａと本体部４０との間に設けられる。 The disc spring 62 is provided between the pressure damping member 56 and the support surface 40y. The disc spring 62 is provided between the pressure damping member 56 and the main body 40. The disc spring 62 is provided between the second convex portion 56a and the support surface 40y. The disc spring 62 is provided between the second convex portion 56a and the main body portion 40.
　皿ばね６２は、例えば、直列に複数個が組み合わされる。皿ばね６２は、ダイカスト品の製造時にたわむことにより、溶湯に生じるサージ圧を吸収する機能を有する。 A plurality of disc springs 62 are combined in series, for example. The disc spring 62 has a function of absorbing the surge pressure generated in the molten metal by bending during the production of the die-cast product.
　位置センサ６４は、位置センサ用ロッド５４ｃの近傍に設けられる。位置センサ６４は、位置センサ用ロッド５４ｃの位置を検出する機能を有する。位置センサ６４は、位置センサ用ロッド５４ｃの位置を検出することで、間接的に加圧ピン５２の位置をモニタする。 The position sensor 64 is provided in the vicinity of the position sensor rod 54c. The position sensor 64 has a function of detecting the position of the position sensor rod 54c. The position sensor 64 indirectly monitors the position of the pressurizing pin 52 by detecting the position of the position sensor rod 54c.
　位置センサ６４は、例えば、光学式又は磁気式のリニアエンコーダである。 The position sensor 64 is, for example, an optical or magnetic linear encoder.
　次に、第１の実施形態の局部加圧装置５０の動作の一例について説明する。図３、図４、図５、図６、図７、図８、図９、及び図１０は、第１の実施形態の局部加圧装置の動作の説明図である。 Next, an example of the operation of the local pressurizing device 50 of the first embodiment will be described. 3, FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 8, FIG. 9, and FIG. 10 are explanatory views of the operation of the local pressurizing device of the first embodiment.
　ダイカスト品の製造前は、固定型１８ａと可動型１８ｂは離間した状態にある（図３）。加圧ピン５２の第１の凸部５２ａは、例えば、本体部４０に接している。加圧ピン５２は後退限の位置にある。圧力減衰部材５６は前進限の位置にある。 Before manufacturing the die-cast product, the fixed type 18a and the movable type 18b are separated from each other (Fig. 3). The first convex portion 52a of the pressure pin 52 is in contact with, for example, the main body portion 40. The pressure pin 52 is in the position of the retreat limit. The pressure damping member 56 is in the forward limit position.
　次に、可動ダイプレート２６を移動させ、可動ダイプレート２６に固定された可動型１８ｂを固定型１８ａに接触させる（図４）。可動型１８ｂと固定型１８ａとの間に空洞Ｃａが形成される。その後、型締装置１０を用いて、可動型１８ｂと固定型１８ａの型締めが行われる。 Next, the movable die plate 26 is moved, and the movable mold 18b fixed to the movable die plate 26 is brought into contact with the fixed mold 18a (FIG. 4). A cavity Ca is formed between the movable mold 18b and the fixed mold 18a. After that, the movable mold 18b and the fixed mold 18a are mold-fastened using the mold clamping device 10.
　次に、射出装置１４を用いて、金型１８の空洞Ｃａの中に溶湯７０を充填する（図５）。射出装置１４により溶湯７０に圧力が印加され、溶湯７０の圧力が上昇する。 Next, the molten metal 70 is filled in the cavity Ca of the mold 18 using the injection device 14 (FIG. 5). Pressure is applied to the molten metal 70 by the injection device 14, and the pressure of the molten metal 70 rises.
　溶湯７０の圧力が上昇すると、溶湯７０の圧力で圧力減衰部材５６が後退する。皿ばね６２がたわみ、溶湯７０の圧力を吸収する。溶湯７０の圧力と皿ばね６２の弾性力とがつり合った時点で圧力減衰部材５６の後退が止まる（図６）。 When the pressure of the molten metal 70 rises, the pressure damping member 56 retracts due to the pressure of the molten metal 70. The disc spring 62 bends and absorbs the pressure of the molten metal 70. When the pressure of the molten metal 70 and the elastic force of the disc spring 62 are balanced, the retreat of the pressure damping member 56 stops (FIG. 6).
　その後、皿ばね６２の弾性力により圧力減衰部材５６が前進する。第２の凸部５６ａが本体部４０に接した時点で圧力減衰部材５６の前進が止まる（図７）。第２の凸部５６ａが本体部４０に接した位置が圧力減衰部材５６の前進限となる。 After that, the pressure damping member 56 advances due to the elastic force of the disc spring 62. The advance of the pressure damping member 56 stops when the second convex portion 56a comes into contact with the main body portion 40 (FIG. 7). The position where the second convex portion 56a is in contact with the main body portion 40 is the forward limit of the pressure damping member 56.
　次に、アクチュエータ５４を用いて、加圧ピン５２を前進させる（図８）。加圧ピン５２により凝固を開始した溶湯７０の一部が加圧される。 Next, the pressurizing pin 52 is advanced by using the actuator 54 (FIG. 8). A part of the molten metal 70 that has started solidification is pressurized by the pressure pin 52.
　加圧ピン５２の前進を開始させるタイミングは、例えば、射出装置１４の射出速度の変化と連動させる。加圧ピン５２の前進を開始させるタイミングは、例えば、制御装置３２が局部加圧装置５０を制御することで、制御される。 The timing at which the pressurizing pin 52 starts advancing is linked with, for example, a change in the injection speed of the injection device 14. The timing at which the advancement of the pressurizing pin 52 is started is controlled, for example, by the control device 32 controlling the local pressurizing device 50.
　加圧ピン５２の前進量は、例えば、加圧ピン５２の位置を位置センサ６４でモニタすることで制御可能である。加圧ピン５２の前進量は、例えば、制御装置３２が局部加圧装置５０を制御することで、制御される。 The amount of advance of the pressurizing pin 52 can be controlled, for example, by monitoring the position of the pressurizing pin 52 with the position sensor 64. The amount of advance of the pressurizing pin 52 is controlled, for example, by the control device 32 controlling the local pressurizing device 50.
　溶湯７０が完全に凝固した後、型締装置１０を用いて型開きが行われる。製造されたダイカスト品は、押出装置１２を用いて可動型１８ｂから押し出される。加圧ピン５２は、例えば、アクチュエータ５４を用いて、後退限まで後退させる（図９）。 After the molten metal 70 is completely solidified, the mold is opened using the mold clamping device 10. The produced die-cast product is extruded from the movable mold 18b using the extruder 12. The pressurizing pin 52 is retracted to the retracting limit by using, for example, an actuator 54 (FIG. 9).
　次に、例えば、アクチュエータ５４を用いて、加圧ピン５２を前進させる（図１０）。加圧ピン５２を、例えば、前進限まで前進させる。加圧ピン５２の第１の凸部５２ａが圧力減衰部材５６に接した位置が、加圧ピン５２の前進限となる。 Next, for example, the actuator 54 is used to advance the pressure pin 52 (FIG. 10). The pressure pin 52 is advanced to, for example, the advance limit. The position where the first convex portion 52a of the pressure pin 52 is in contact with the pressure damping member 56 is the advance limit of the pressure pin 52.
　例えば、圧力減衰部材５６と本体部４０との間に溶湯７０が侵入し凝固することで、圧力減衰部材５６が前進限まで戻っていなかった場合を考える。この場合でも、加圧ピン５２により圧力減衰部材５６を押すことにより、圧力減衰部材５６を前進限まで戻すことが可能である。 For example, consider a case where the pressure damping member 56 has not returned to the forward limit due to the molten metal 70 entering between the pressure damping member 56 and the main body 40 and solidifying. Even in this case, the pressure damping member 56 can be returned to the forward limit by pushing the pressure damping member 56 with the pressure pin 52.
　次に、第１の実施形態の成形機用金型及び成形機の作用及び効果について説明する。すなわち、第１の実施形態の固定型１８ａ及びダイカストマシン１００の作用及び効果について説明する。 Next, the operation and effect of the molding machine mold and the molding machine of the first embodiment will be described. That is, the operations and effects of the fixed type 18a and the die casting machine 100 of the first embodiment will be described.
　ダイカスト品の品質を向上させるために、ダイカスト品の内部の引け巣を抑制することが望まれる。第１の実施形態の固定型１８ａは、局部加圧装置５０を備える。溶湯７０が金型１８内で凝固を開始してから、局部加圧装置５０の加圧ピン５２を溶湯７０に押し込むことで、溶湯７０を局部的に加圧することが可能である。 In order to improve the quality of die-cast products, it is desirable to suppress the shrinkage cavities inside the die-cast products. The fixed type 18a of the first embodiment includes a local pressurizing device 50. After the molten metal 70 starts solidifying in the mold 18, the molten metal 70 can be locally pressurized by pushing the pressurizing pin 52 of the local pressurizing device 50 into the molten metal 70.
　溶湯７０を局部的に加圧することで、引け巣を抑制することが可能となる。したがって、第１の実施形態の固定型１８ａ及びダイカストマシン１００によれば、ダイカスト品の品質を向上させることが可能となる。 By locally pressurizing the molten metal 70, it is possible to suppress shrinkage cavities. Therefore, according to the fixed type 18a and the die casting machine 100 of the first embodiment, it is possible to improve the quality of the die casting product.
　図１１は、第１の実施形態の成形機の動作の一例を示すグラフである。横軸は時間である。図１１では、時間が経過するほど、プロットされる点は紙面右側に位置する。紙面左側の縦軸は、射出速度、すなわち射出装置の射出プランジャの速度を示している。また、紙面右側の縦軸は、空洞Ｃａ内の溶湯に加えられる圧力を示している。 FIG. 11 is a graph showing an example of the operation of the molding machine of the first embodiment. The horizontal axis is time. In FIG. 11, as time goes by, the plotted points are located on the right side of the paper. The vertical axis on the left side of the paper shows the injection speed, that is, the speed of the injection plunger of the injection device. The vertical axis on the right side of the paper shows the pressure applied to the molten metal in the cavity Ca.
　図１１中、実線Ｃｖは射出プランジャの速度である。図１１中、点線Ｃｐ０及び実線Ｃｐ１は溶湯に加えられる圧力である。点線Ｃｐ０は比較例の成形機用金型を用いた場合、実線Ｃｐ１は第１の実施形態の成形機用金型を用いた場合である。比較例の成形機用金型は、局部加圧装置５０を備えない点で、第１の実施形態の成形機用金型と異なる。 In FIG. 11, the solid line Cv is the speed of the injection plunger. In FIG. 11, the dotted line Cp0 and the solid line Cp1 are the pressures applied to the molten metal. The dotted line Cp0 is the case where the mold for the molding machine of the comparative example is used, and the solid line Cp1 is the case where the mold for the molding machine of the first embodiment is used. The molding machine mold of the comparative example is different from the molding machine mold of the first embodiment in that the local pressurizing device 50 is not provided.
　図１１中点線Ｃｘは、バリ吹き臨界曲線である。溶湯に加えられる圧力がバリ吹き臨界曲線を超えると、溶湯に加えられる圧力が型締力を上回りバリ吹きが発生するおそれがある。 The middle dotted line Cx in FIG. 11 is a burr-blown critical curve. If the pressure applied to the molten metal exceeds the burr blowing critical curve, the pressure applied to the molten metal may exceed the mold clamping force and burr blowing may occur.
　射出速度は、初期は溶湯への気体の巻き込みを抑制する観点から低速度である。射出速度は途中から、溶湯の空洞への充填時間を短縮するために高速度となる。 Initially, the injection speed is low from the viewpoint of suppressing the entrainment of gas in the molten metal. The injection speed is increased from the middle to shorten the filling time of the molten metal into the cavity.
　特に、ダイカスト品の大型化や薄肉化に対応するためには、金型内の空洞に短時間で溶湯を充填することが要求される。このため、射出速度を高速化することが必要となる。 In particular, in order to cope with the increase in size and thinning of die-cast products, it is required to fill the cavity in the mold with molten metal in a short time. Therefore, it is necessary to increase the injection speed.
　しかし、射出速度を高速化すると、射出プランジャの慣性力によって溶湯に生じるサージ圧により、バリが吹きやすくなるという問題が生じる。例えば、比較例の場合、点線Ｃｐ０で示すように、溶湯に加えられる圧力がバリ吹き臨界曲線Ｃｘを超え、バリ吹きが発生するおそれがある。 However, if the injection speed is increased, there is a problem that burrs are easily blown due to the surge pressure generated in the molten metal due to the inertial force of the injection plunger. For example, in the case of the comparative example, as shown by the dotted line Cp0, the pressure applied to the molten metal may exceed the burr blowing critical curve Cx, and burr blowing may occur.
　バリ吹きが発生すると、例えば、ダイカスト品の品質が低下し不良品となる。また、例えば、安全上の大きな問題となり得る。 When burr blowing occurs, for example, the quality of the die-cast product deteriorates and it becomes a defective product. It can also be a major safety issue, for example.
　第１の実施形態の成形機用金型、すなわち固定型１８ａは、局部加圧装置５０を備える。局部加圧装置５０は、圧力減衰部材５６を備える。 The molding machine mold of the first embodiment, that is, the fixed mold 18a includes a local pressurizing device 50. The local pressurizing device 50 includes a pressure damping member 56.
　金型１８の空洞Ｃａに溶湯７０が充填された際、溶湯に加えられる圧力が上昇すると圧力減衰部材５６が後退し、溶湯に加えられた圧力が減衰する。したがって、実線Ｃｐ１で示すように、サージ圧が低減される。よって、第１の実施形態の成形機用金型を用いることにより、ダイカスト品の品質が向上する。 When the molten metal 70 is filled in the cavity Ca of the mold 18, when the pressure applied to the molten metal rises, the pressure damping member 56 retracts and the pressure applied to the molten metal is attenuated. Therefore, as shown by the solid line Cp1, the surge pressure is reduced. Therefore, the quality of the die-cast product is improved by using the mold for the molding machine of the first embodiment.
　局部加圧装置５０は、第１のシール部材５８を有することが好ましい。例えば、圧力減衰部材５６と本体部４０との間に溶湯７０が侵入し凝固すると、圧力減衰部材５６の移動が妨げられる。特に、溶湯７０が皿ばね６２が設けられた領域にまで侵入し凝固すると、圧力減衰部材５６が全く機能しなくなる。 The local pressurizing device 50 preferably has a first sealing member 58. For example, when the molten metal 70 invades between the pressure damping member 56 and the main body 40 and solidifies, the movement of the pressure damping member 56 is hindered. In particular, when the molten metal 70 penetrates into the region where the disc spring 62 is provided and solidifies, the pressure damping member 56 does not function at all.
　第１のシール部材５８を設けることで、圧力減衰部材５６と本体部４０との間に溶湯７０が侵入することが抑制され、局部加圧装置５０の動作の信頼性が向上する。 By providing the first seal member 58, the molten metal 70 is suppressed from entering between the pressure damping member 56 and the main body portion 40, and the reliability of the operation of the local pressurizing device 50 is improved.
　また、加圧ピン５２は第１の凸部５２ａを有することが好ましい。第１の凸部５２ａにより圧力減衰部材５６を押すことが可能となる。例えば、圧力減衰部材５６と本体部４０との間に溶湯７０が侵入し凝固することで、圧力減衰部材５６が前進限まで戻っていない場合を考える。この場合でも、第１の凸部５２ａにより圧力減衰部材５６を押すことにより、圧力減衰部材５６を前進限まで戻すことが可能となる。よって、局部加圧装置５０の動作の信頼性が向上する。 Further, it is preferable that the pressure pin 52 has a first convex portion 52a. The first convex portion 52a makes it possible to push the pressure damping member 56. For example, consider a case where the pressure damping member 56 has not returned to the forward limit due to the molten metal 70 entering between the pressure damping member 56 and the main body 40 and solidifying. Even in this case, the pressure damping member 56 can be returned to the forward limit by pushing the pressure damping member 56 with the first convex portion 52a. Therefore, the reliability of the operation of the local pressurizing device 50 is improved.
　また、第１の凸部５２ａを設けることで、圧力減衰部材５６が前進限まで戻っていることを確認することが容易となる。 Further, by providing the first convex portion 52a, it becomes easy to confirm that the pressure damping member 56 has returned to the forward limit.
　局部加圧装置５０は、第２のシール部材６０を有することが好ましい。例えば、加圧ピン５２と圧力減衰部材５６との間に溶湯７０が侵入し凝固すると、加圧ピン５２及び圧力減衰部材５６の移動が妨げられる。 The local pressurizing device 50 preferably has a second sealing member 60. For example, when the molten metal 70 invades between the pressure pin 52 and the pressure damping member 56 and solidifies, the movement of the pressure pin 52 and the pressure damping member 56 is hindered.
　第２のシール部材６０を設けることで、加圧ピン５２と圧力減衰部材５６との間に溶湯７０が侵入することが抑制され、局部加圧装置５０の動作の信頼性が向上する。 By providing the second seal member 60, the molten metal 70 is suppressed from entering between the pressurizing pin 52 and the pressure damping member 56, and the reliability of the operation of the local pressurizing device 50 is improved.
　局部加圧装置５０の弾性体は、皿ばね６２であることが好ましい。皿ばね６２を用いることで、短い変位量で高い圧力を吸収することが可能となる。 The elastic body of the local pressurizing device 50 is preferably a disc spring 62. By using the disc spring 62, it is possible to absorb a high pressure with a short displacement amount.
　また、局部加圧装置５０は、加圧ピン５２を用いた局部加圧機構と、圧力減衰部材５６を用いたサージ圧低減機構を一体化させることで、局部加圧機構とサージ圧低減機構の小型化を実現することが可能である。 Further, the local pressurizing device 50 integrates a local pressurizing mechanism using the pressurizing pin 52 and a surge pressure reducing mechanism using the pressure damping member 56 to form a local pressurizing mechanism and a surge pressure reducing mechanism. It is possible to realize miniaturization.
　以上、第１の実施形態によれば、サージ圧を低減できる局部加圧装置を備えた成形機用金型及び成形機を実現することが可能となる。 As described above, according to the first embodiment, it is possible to realize a mold for a molding machine and a molding machine equipped with a local pressurizing device capable of reducing surge pressure.
（第２の実施形態）
　第２の実施形態の成形機用金型は、加圧ピンが後退限に位置する場合の加圧ピンの一端は、圧力減衰部材が前進限に位置する場合の圧力減衰部材の一端よりも支持面の側にある点で、第１の実施形態の成形機用金型と異なる。また、第２の実施形態の成形機は、上記金型を備える点で第１の実施形態の成形機と異なる。以下、第１の実施形態と重複する内容については、一部記述を省略する場合がある。 (Second embodiment)
In the molding machine mold of the second embodiment, one end of the pressure pin when the pressure pin is located at the retracting limit is supported more than one end of the pressure damping member when the pressure damping member is located at the forward limit. It differs from the molding machine mold of the first embodiment in that it is on the side of the surface. Further, the molding machine of the second embodiment is different from the molding machine of the first embodiment in that it is provided with the above-mentioned mold. Hereinafter, some descriptions may be omitted for the contents that overlap with the first embodiment.
　図１２は、第２の実施形態の成形機用金型の模式断面図である。図１２は、固定型１８ａと可動型１８ｂとが接触した状態、言い換えれば、固定型１８ａと可動型１８ｂとが型締めされた状態を示す。固定型１８ａと可動型１８ｂで挟まれた領域が、空洞Ｃａである。 FIG. 12 is a schematic cross-sectional view of the mold for a molding machine according to the second embodiment. FIG. 12 shows a state in which the fixed mold 18a and the movable mold 18b are in contact with each other, in other words, a state in which the fixed mold 18a and the movable mold 18b are molded. The region sandwiched between the fixed mold 18a and the movable mold 18b is the cavity Ca.
　固定型１８ａは、本体部４０と局部加圧装置５０を含む。局部加圧装置５０の少なくとも一部は、本体部４０に組み込まれる。 The fixed type 18a includes a main body portion 40 and a local pressurizing device 50. At least a part of the local pressurizing device 50 is incorporated in the main body 40.
　本体部４０は、成形面４０ｘと支持面４０ｙを有する。支持面４０ｙは成形面４０ｘに対向する。成形面４０ｘは、空洞Ｃａの側の面である。支持面４０ｙは固定ダイプレート２４の側の面である。 The main body portion 40 has a molding surface 40x and a support surface 40y. The support surface 40y faces the molding surface 40x. The molded surface 40x is a surface on the side of the cavity Ca. The support surface 40y is a surface on the side of the fixed die plate 24.
　局部加圧装置５０は、加圧ピン５２、アクチュエータ５４、圧力減衰部材５６、第１のシール部材５８、第２のシール部材６０、皿ばね６２（弾性体）、及び位置センサ６４を含む。加圧ピン５２は、第１の凸部５２ａ（凸部）を有する。アクチュエータ５４は、シリンダ５４ａ、ピストン５４ｂ、位置センサ用ロッド５４ｃ、ロッド側室５４ｘ、キャップ側室５４ｙを有する。圧力減衰部材５６は、第２の凸部５６ａを有する。 The local pressurizing device 50 includes a pressurizing pin 52, an actuator 54, a pressure damping member 56, a first sealing member 58, a second sealing member 60, a disc spring 62 (elastic body), and a position sensor 64. The pressure pin 52 has a first convex portion 52a (convex portion). The actuator 54 has a cylinder 54a, a piston 54b, a position sensor rod 54c, a rod side chamber 54x, and a cap side chamber 54y. The pressure damping member 56 has a second convex portion 56a.
　皿ばね６２は、弾性体の一例である。第１の凸部５２ａは、凸部の一例である。 The disc spring 62 is an example of an elastic body. The first convex portion 52a is an example of the convex portion.
　図１３は、第２の実施形態の成形機用金型の模式断面図である。図１３は、加圧ピン５２が後退限に位置する状態を示す。図１３では、圧力減衰部材５６は前進限に位置する状態を示す。 FIG. 13 is a schematic cross-sectional view of the mold for a molding machine according to the second embodiment. FIG. 13 shows a state in which the pressure pin 52 is located at the retracting limit. FIG. 13 shows a state in which the pressure damping member 56 is located at the forward limit.
　加圧ピン５２の後退限の位置は、第１の凸部５２ａが本体部４０に接触する位置で規定される。圧力減衰部材５６の前進限の位置は、第２の凸部５６ａが本体部４０に接触する位置で規定される。 The position of the retreat limit of the pressure pin 52 is defined by the position where the first convex portion 52a comes into contact with the main body portion 40. The position of the forward limit of the pressure damping member 56 is defined by the position where the second convex portion 56a comes into contact with the main body portion 40.
　図１３に示すように、加圧ピン５２が後退限に位置する場合の加圧ピン５２の空洞Ｃａ側の一端は、圧力減衰部材５６が前進限に位置する場合の圧力減衰部材５６の空洞Ｃａ側の一端よりも支持面４０ｙの側にある。言い換えれば、加圧ピン５２の空洞Ｃａ側の端部は、圧力減衰部材５６の空洞Ｃａ側の端部よりも、支持面４０ｙの側にある。 As shown in FIG. 13, one end of the pressure pin 52 on the cavity Ca side when the pressure pin 52 is located in the backward limit is the cavity Ca of the pressure damping member 56 when the pressure damping member 56 is located in the forward limit. It is on the side of the support surface 40y with respect to one end of the side. In other words, the end of the pressure pin 52 on the cavity Ca side is closer to the support surface 40y than the end of the pressure damping member 56 on the cavity Ca side.
　次に、第２の実施形態の局部加圧装置５０の動作の一例について説明する。図１４、図１５、図１６、図１７、図１８、図１９、図２０、及び図２１は、第２の実施形態の局部加圧装置の動作の説明図である。 Next, an example of the operation of the local pressurizing device 50 of the second embodiment will be described. 14, FIG. 15, FIG. 16, FIG. 17, FIG. 18, FIG. 19, FIG. 20, and FIG. 21 are explanatory views of the operation of the local pressurizing device of the second embodiment.
　ダイカスト品の製造前は、固定型１８ａと可動型１８ｂは離間した状態にある（図１４）。加圧ピン５２の第１の凸部５２ａは、例えば、圧力減衰部材５６と本体部４０との間の位置にある。圧力減衰部材５６は前進限の位置にある。 Before manufacturing the die-cast product, the fixed type 18a and the movable type 18b are separated from each other (FIG. 14). The first convex portion 52a of the pressure pin 52 is located, for example, at a position between the pressure damping member 56 and the main body portion 40. The pressure damping member 56 is in the forward limit position.
　次に、可動ダイプレート２６を移動させ、可動ダイプレート２６に固定された可動型１８ｂを固定型１８ａに接触させる（図１５）。可動型１８ｂと固定型１８ａとの間に空洞Ｃａが形成される。その後、型締装置１０を用いて、可動型１８ｂと固定型１８ａの型締めが行われる。 Next, the movable die plate 26 is moved, and the movable mold 18b fixed to the movable die plate 26 is brought into contact with the fixed mold 18a (FIG. 15). A cavity Ca is formed between the movable mold 18b and the fixed mold 18a. After that, the movable mold 18b and the fixed mold 18a are mold-fastened using the mold clamping device 10.
　次に、射出装置１４を用いて、金型１８の空洞Ｃａの中に溶湯７０を充填する（図１６）。射出装置１４により溶湯７０に圧力が印加され、溶湯７０の圧力が上昇する。 Next, the molten metal 70 is filled in the cavity Ca of the mold 18 using the injection device 14 (FIG. 16). Pressure is applied to the molten metal 70 by the injection device 14, and the pressure of the molten metal 70 rises.
　溶湯７０の圧力が上昇すると、溶湯７０の圧力で圧力減衰部材５６が後退する。皿ばね６２がたわみ、溶湯７０の圧力を吸収する。溶湯７０の圧力と皿ばね６２の弾性力とがつり合った時点で圧力減衰部材５６の後退が止まる。 When the pressure of the molten metal 70 rises, the pressure damping member 56 retracts due to the pressure of the molten metal 70. The disc spring 62 bends and absorbs the pressure of the molten metal 70. When the pressure of the molten metal 70 and the elastic force of the disc spring 62 are balanced, the retreat of the pressure damping member 56 stops.
　また、溶湯７０の圧力が上昇すると、溶湯７０の圧力で加圧ピン５２が後退する。例えば、キャップ側室５４ｙの作動油が圧縮され、溶湯７０の圧力を吸収する。溶湯７０の圧力とキャップ側室５４ｙの作動油の圧力とがつり合った時点で加圧ピン５２の後退が止まる（図１７）。 Further, when the pressure of the molten metal 70 rises, the pressure pin 52 retracts due to the pressure of the molten metal 70. For example, the hydraulic oil in the cap side chamber 54y is compressed and absorbs the pressure of the molten metal 70. When the pressure of the molten metal 70 and the pressure of the hydraulic oil in the cap side chamber 54y are balanced, the retreat of the pressurizing pin 52 stops (FIG. 17).
　その後、皿ばね６２の弾性力により圧力減衰部材５６が前進する。第２の凸部５６ａが本体部４０に接した時点で圧力減衰部材５６の前進が止まる。第２の凸部５６ａが本体部４０に接した位置が圧力減衰部材５６の前進限となる。 After that, the pressure damping member 56 advances due to the elastic force of the disc spring 62. The advance of the pressure damping member 56 stops when the second convex portion 56a comes into contact with the main body portion 40. The position where the second convex portion 56a is in contact with the main body portion 40 is the forward limit of the pressure damping member 56.
　また、アクチュエータ５４を用いて、加圧ピン５２を前進させる（図１８）。加圧ピン５２の前進を開始させるタイミングは、例えば、位置センサ６４の測定結果に基づく。例えば、溶湯７０の圧力による加圧ピン５２の後退を位置センサ６４で検知し、加圧ピン５２の後退から所定の時間経過した後に、加圧ピン５２を前進させる。加圧ピン５２の前進を開始させるタイミングは、例えば、制御装置３２が位置センサ６４の測定結果に基づき局部加圧装置５０を制御することで、制御される。 Further, the pressurizing pin 52 is advanced by using the actuator 54 (FIG. 18). The timing for starting the advancement of the pressurizing pin 52 is based on, for example, the measurement result of the position sensor 64. For example, the position sensor 64 detects the retreat of the pressurizing pin 52 due to the pressure of the molten metal 70, and the pressurizing pin 52 is advanced after a predetermined time has elapsed from the retreating of the pressurizing pin 52. The timing at which the advance of the pressurizing pin 52 is started is controlled, for example, by the control device 32 controlling the local pressurizing device 50 based on the measurement result of the position sensor 64.
　次に、アクチュエータ５４を用いて、加圧ピン５２を更に前進させる（図１９）。加圧ピン５２により凝固を開始した溶湯７０の一部が加圧される。加圧ピン５２の前進を開始させるタイミングは、例えば、制御装置３２が局部加圧装置５０を制御することで、制御される。 Next, the pressurizing pin 52 is further advanced by using the actuator 54 (FIG. 19). A part of the molten metal 70 that has started solidification is pressurized by the pressure pin 52. The timing at which the advancement of the pressurizing pin 52 is started is controlled, for example, by the control device 32 controlling the local pressurizing device 50.
　加圧ピン５２の前進量は、例えば、加圧ピン５２の位置を位置センサ６４でモニタすることで制御可能である。加圧ピン５２の前進量は、例えば、制御装置３２が局部加圧装置５０を制御することで、制御される。 The amount of advance of the pressurizing pin 52 can be controlled, for example, by monitoring the position of the pressurizing pin 52 with the position sensor 64. The amount of advance of the pressurizing pin 52 is controlled, for example, by the control device 32 controlling the local pressurizing device 50.
　溶湯７０が完全に凝固した後、型締装置１０を用いて型開きが行われる。製造されたダイカスト品は、押出装置１２を用いて可動型１８ｂから押し出される。加圧ピン５２は、例えば、アクチュエータ５４を用いて後退させる（図２０）。 After the molten metal 70 is completely solidified, the mold is opened using the mold clamping device 10. The produced die-cast product is extruded from the movable mold 18b using the extruder 12. The pressure pin 52 is retracted using, for example, an actuator 54 (FIG. 20).
　次に、例えば、アクチュエータ５４を用いて、加圧ピン５２を前進させる（図２１）。加圧ピン５２を、例えば、前進限まで前進させる。加圧ピン５２の第１の凸部５２ａが圧力減衰部材５６に接した位置が、加圧ピン５２の前進限となる。 Next, for example, the actuator 54 is used to advance the pressure pin 52 (FIG. 21). The pressure pin 52 is advanced to, for example, the advance limit. The position where the first convex portion 52a of the pressure pin 52 is in contact with the pressure damping member 56 is the advance limit of the pressure pin 52.
　例えば、圧力減衰部材５６と本体部４０との間に溶湯７０が侵入し凝固することで、圧力減衰部材５６が前進限まで戻っていなかった場合を考える。この場合でも、加圧ピン５２により圧力減衰部材５６を押すことにより、圧力減衰部材５６を前進限まで戻すことが可能である。 For example, consider a case where the pressure damping member 56 has not returned to the forward limit due to the molten metal 70 entering between the pressure damping member 56 and the main body 40 and solidifying. Even in this case, the pressure damping member 56 can be returned to the forward limit by pushing the pressure damping member 56 with the pressure pin 52.
　次に、第２の実施形態の成形機用金型及び成形機の作用及び効果について説明する。すなわち、第２の実施形態の固定型１８ａ及びダイカストマシン１００の作用及び効果について説明する。 Next, the operation and effect of the molding machine mold and the molding machine of the second embodiment will be described. That is, the operations and effects of the fixed type 18a and the die casting machine 100 of the second embodiment will be described.
　第２の実施形態の固定型１８ａ及びダイカストマシン１００によれば、第１の実施形態と同様、局部加圧装置５０を備えることにより、引け巣を抑制することが可能となる。したがって、第２の実施形態の固定型１８ａ及びダイカストマシン１００によれば、ダイカスト品の品質を向上させることが可能となる。 According to the fixed type 18a and the die casting machine 100 of the second embodiment, the shrinkage cavities can be suppressed by providing the local pressurizing device 50 as in the first embodiment. Therefore, according to the fixed type 18a and the die casting machine 100 of the second embodiment, it is possible to improve the quality of the die casting product.
　第２の実施形態の成形機用金型、すなわち固定型１８ａは、局部加圧装置５０を備える。局部加圧装置５０は、圧力減衰部材５６を備える。 The molding machine mold of the second embodiment, that is, the fixed mold 18a includes a local pressurizing device 50. The local pressurizing device 50 includes a pressure damping member 56.
　圧力減衰部材５６を備えることにより、第１の実施形態と同様、サージ圧が低減される。また、金型１８の空洞Ｃａに溶湯７０が充填された際、溶湯に加えられる圧力が上昇すると、加圧ピン５２も後退する。圧力減衰部材５６に加え、加圧ピン５２が後退することにより、更にサージ圧が低減される。よって、第２の実施形態の成形機用金型を用いることにより、ダイカスト品の品質が向上する。 By providing the pressure damping member 56, the surge pressure is reduced as in the first embodiment. Further, when the molten metal 70 is filled in the cavity Ca of the mold 18, when the pressure applied to the molten metal increases, the pressure pin 52 also retracts. By retracting the pressure pin 52 in addition to the pressure damping member 56, the surge pressure is further reduced. Therefore, the quality of the die-cast product is improved by using the mold for the molding machine of the second embodiment.
　また、第２の実施形態によれば、加圧ピン５２の前進を開始させるタイミングを、加圧ピン５２の後退を位置センサ６４で検知することで設定することが可能である。したがって、溶湯７０を加圧するタイミングを、最適なタイミングに設定することが可能である。よって、第２の実施形態の成形機用金型を用いることにより、ダイカスト品の品質が更に向上する。 Further, according to the second embodiment, it is possible to set the timing at which the advancement of the pressure pin 52 is started by detecting the retreat of the pressure pin 52 with the position sensor 64. Therefore, it is possible to set the timing of pressurizing the molten metal 70 to the optimum timing. Therefore, by using the mold for the molding machine of the second embodiment, the quality of the die-cast product is further improved.
　以上、第２の実施形態によれば、サージ圧を低減できる局部加圧装置を備えた成形機用金型及び成形機を実現することが可能となる。
る。 As described above, according to the second embodiment, it is possible to realize a mold for a molding machine and a molding machine provided with a local pressurizing device capable of reducing the surge pressure.
To.
　以上、具体例を参照しつつ本発明の実施形態について説明した。しかし、本発明は、これらの具体例に限定されるものではない。実施形態においては、成形機用金型及び成形機などで、本発明の説明に直接必要としない部分については記載を省略したが、必要とされる、成形機用金型及び成形機などに関わる要素を適宜選択して用いることができる。 The embodiment of the present invention has been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In the embodiment, although the description of the parts that are not directly necessary for the description of the present invention in the molding machine mold and the molding machine is omitted, it relates to the molding machine mold and the molding machine that are required. Elements can be appropriately selected and used.
　第１の実施形態及び第２の実施形態においては、本発明の成形機用金型が固定型１８ａである場合を例に説明したが、本発明の成形機用金型は可動型１８ｂであっても構わない。すなわち、可動型１８ｂが局部加圧装置５０を備える構成であっても構わない。 In the first embodiment and the second embodiment, the case where the mold for the molding machine of the present invention is the fixed mold 18a has been described as an example, but the mold for the molding machine of the present invention is the movable mold 18b. It doesn't matter. That is, the movable type 18b may be configured to include the local pressurizing device 50.
　第１の実施形態及び第２の実施形態においては、局部加圧装置５０が空洞Ｃａの製品領域を加圧する場合を例に説明したが、局部加圧装置５０が空洞Ｃａの非製品領域を加圧する構成とすることも可能である。非製品領域は、例えば、ランナー、オーバーフロー、エアベントなどである。 In the first embodiment and the second embodiment, the case where the local pressurizing device 50 pressurizes the product area of the cavity Ca has been described as an example, but the local pressurizing device 50 adds the non-product area of the cavity Ca. It is also possible to have a configuration that presses. Non-product areas are, for example, runners, overflows, air vents, and the like.
　第１の実施形態及び第２の実施形態においては、弾性体が皿ばね６２の場合を例に説明したが、弾性体は皿ばね６２以外、例えば、コイルばねや板ばねであっても構わない。 In the first embodiment and the second embodiment, the case where the elastic body is a disc spring 62 has been described as an example, but the elastic body may be a coil spring or a leaf spring other than the disc spring 62, for example. ..
　第１の実施形態及び第２の実施形態においては、局部加圧装置５０を成形機用金型に１個設ける場合を例に説明したが、成形機用金型に複数個の局部加圧装置５０を設けることも可能である。 In the first embodiment and the second embodiment, the case where one local pressurizing device 50 is provided in the molding machine mold has been described as an example, but a plurality of local pressurizing devices are provided in the molding machine mold. It is also possible to provide 50.
　第１の実施形態及び第２の実施形態においては、ダイカストマシンを成形機の例として説明したが、本発明を射出成形機等に適用することも可能である。 In the first embodiment and the second embodiment, the die casting machine has been described as an example of a molding machine, but the present invention can also be applied to an injection molding machine or the like.
　その他、本発明の要素を具備し、当業者が適宜設計変更しうる全ての成形機用金型及び成形機は、本発明の範囲に包含される。本発明の範囲は、特許請求の範囲及びその均等物の範囲によって定義されるものである。 In addition, all molds and molding machines for molding machines that have the elements of the present invention and can be appropriately redesigned by those skilled in the art are included in the scope of the present invention. The scope of the invention is defined by the scope of claims and their equivalents.
４０　　　　本体部
４０ｘ　　　成形面
４０ｙ　　　支持面
５０　　　　局部加圧装置
５２　　　　加圧ピン
５２ａ　　　第１の凸部（凸部）
５４　　　　アクチュエータ
５６　　　　圧力減衰部材
５８　　　　第１のシール部材
６０　　　　第２のシール部材
６２　　　　皿ばね（弾性体）
６４　　　　位置センサ
１００　　　ダイカストマシン
Ｃａ　　　　空洞 40 Main body 40 x Molded surface 40y Support surface 50 Local pressurizing device 52 Pressurizing pin 52a First convex portion (convex portion)
54 Actuator 56 Pressure damping member 58 First sealing member 60 Second sealing member 62 Belleville spring (elastic body)
64 Position sensor 100 Die casting machine Ca Cavity

Claims (10)

  1. 　成形面と前記成形面に対向する支持面を有する本体部と、少なくとも一部が前記本体部に組み込まれた局部加圧装置と、を備え、
    　前記局部加圧装置は、
    　一端が前記本体部の前記成形面の側に露出する加圧ピンと、
    　前記本体部の前記支持面の側に設けられ、前記加圧ピンを駆動するアクチュエータと、
    　前記加圧ピンと前記本体部との間に前記加圧ピンを囲んで設けられ、一端が前記本体部の前記成形面の側に露出する圧力減衰部材と、
    　前記圧力減衰部材と前記支持面との間に設けられた弾性体と、
    を含むことを特徴とする成形機用金型。     A main body portion having a molding surface and a support surface facing the molding surface, and a local pressurizing device having at least a part incorporated in the main body portion are provided.
    The local pressurizing device is
    A pressure pin whose one end is exposed on the side of the molded surface of the main body,
    An actuator provided on the side of the support surface of the main body and driving the pressure pin, and an actuator
    A pressure damping member provided between the pressure pin and the main body portion so as to surround the pressure pin and one end of which is exposed on the side of the molding surface of the main body portion.
    An elastic body provided between the pressure damping member and the support surface,
    Molds for molding machines, characterized by containing.
  2. 　前記局部加圧装置は、前記圧力減衰部材と前記本体部との間に前記圧力減衰部材を囲んで設けられた環状の第１のシール部材を、更に含むことを特徴とする請求項１記載の成形機用金型。 The first aspect of claim 1, wherein the local pressurizing device further includes an annular first sealing member provided between the pressure damping member and the main body portion so as to surround the pressure damping member. Mold for molding machine.
  3. 　前記第１のシール部材は鋳鉄又はスチールを含むことを特徴とする請求項２記載の成形機用金型。 The mold for a molding machine according to claim 2, wherein the first sealing member contains cast iron or steel.
  4. 　前記局部加圧装置は、前記加圧ピンと前記圧力減衰部材との間に前記加圧ピンを囲んで設けられた環状の第２のシール部材を、更に含むことを特徴とする請求項２又は請求項３記載の成形機用金型。 2. Item 3. Mold for molding machine according to Item 3.
  5. 　前記加圧ピンは前記圧力減衰部材の他端に接触可能な環状の凸部を有することを特徴とする請求項１ないし請求項４いずれか一項記載の成形機用金型。 The molding machine mold according to any one of claims 1 to 4, wherein the pressure pin has an annular convex portion that can come into contact with the other end of the pressure damping member.
  6. 　前記加圧ピンの位置をモニタする位置センサを、更に備えることを特徴とする請求項１ないし請求項５いずれか一項記載の成形機用金型。 The molding machine mold according to any one of claims 1 to 5, further comprising a position sensor for monitoring the position of the pressure pin.
  7. 　前記弾性体は皿ばねであることを特徴とする請求項１ないし請求項６いずれか一項記載の成形機用金型。 The molding machine mold according to any one of claims 1 to 6, wherein the elastic body is a disc spring.
  8. 　前記加圧ピンが後退限に位置する場合の前記加圧ピンの前記一端は、前記圧力減衰部材が前進限に位置する場合の前記圧力減衰部材の前記一端と面一か前記成形面の側に突出した位置にあることを特徴とする請求項１ないし請求項７いずれか一項記載の成形機用金型。 The one end of the pressure pin when the pressure pin is located in the receding limit is flush with the one end of the pressure damping member when the pressure damping member is located in the forward limit or on the side of the molded surface. The molding machine mold according to any one of claims 1 to 7, wherein the mold is in a protruding position.
  9. 　前記加圧ピンが後退限に位置する場合の前記加圧ピンの前記一端は、前記圧力減衰部材が前進限に位置する場合の前記圧力減衰部材の前記一端よりも前記支持面の側にあることを特徴とする請求項１ないし請求項７いずれか一項記載の成形機用金型。 The one end of the pressure pin when the pressure pin is located in the retracting limit is closer to the support surface than the one end of the pressure damping member when the pressure damping member is located in the forward limit. The molding machine mold according to any one of claims 1 to 7, wherein the mold is for a molding machine.
  10. 　前記請求項１ないし請求項９いずれか一項記載の成形機用金型を備える成形機。

          A molding machine provided with a mold for a molding machine according to any one of claims 1 to 9.
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MX2023007482A (en) 2023-07-05
JP7133004B2 (en) 2022-09-07

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